diff --git a/location/agnss/bundle.json b/location/agnss/bundle.json
index 0d4e45b894914e841acd5d82f53d9f4146879291..6969ee5c180c9e2a92db47e90fbba09bf7abcaa3 100644
--- a/location/agnss/bundle.json
+++ b/location/agnss/bundle.json
@@ -56,6 +56,30 @@
               ],
               "header_base": "//drivers/interface/location/agnss"
             }
+          },
+          {
+            "name": "//drivers/interface/location/agnss/v2_1:liblocation_agnss_proxy_2.1",
+            "header": {
+              "header_files": [
+              ],
+              "header_base": "//drivers/interface/location/agnss"
+            }
+          },
+          {
+            "name": "//drivers/interface/location/agnss/v2_1:location_agnss_idl_headers",
+            "header": {
+              "header_files": [
+              ],
+              "header_base": "//drivers/interface/location/agnss"
+            }
+          },
+          {
+            "name": "//drivers/interface/location/agnss/v2_1:liblocation_agnss_stub_2.1",
+            "header": {
+              "header_files": [
+              ],
+              "header_base": "//drivers/interface/location/agnss"
+            }
           }
         ]
       }
diff --git a/location/agnss/v2_1/AGnssTypes.idl b/location/agnss/v2_1/AGnssTypes.idl
new file mode 100644
index 0000000000000000000000000000000000000000..22f861c9a79f6dce12c526919c0e19a623d1b003
--- /dev/null
+++ b/location/agnss/v2_1/AGnssTypes.idl
@@ -0,0 +1,208 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * @addtogroup HdiAGnss
+ * @{
+ *
+ * @brief Provides unified APIs for the AGNSS service.
+ *
+ * The upper layer can use the interfaces provided by this module to set the AGNSS callback, AGNSS server address,
+ * AGNSS reference information, and setId.
+ *
+ * @since 5.0
+ */
+
+/*
+ * @file AGnssTypes.idl
+ *
+ * @brief Defines the data structure used by the AGNSS module.
+ *
+ * @since 5.0
+ * @version 2.0
+ */
+
+package ohos.hdi.location.agnss.v2_1;
+
+/*
+ * @brief Defines the AGNSS reference information type.
+ *
+ * @since 5.0
+ */
+enum AGnssRefInfoType {
+    ANSS_REF_INFO_TYPE_CELLID = 1,
+    ANSS_REF_INFO_TYPE_MAC = 2,
+};
+
+/*
+ * @brief Defines the protocol type of the AGNSS user plane.
+ *
+ * @since 5.0
+ */
+enum AGnssUserPlaneProtocol {
+    AGNSS_TYPE_SUPL         = 1,
+    AGNSS_TYPE_C2K          = 2,
+    AGNSS_TYPE_SUPL_IMS     = 3,
+    AGNSS_TYPE_SUPL_EIMS    = 4
+};
+
+/*
+ * @brief Defines the action type for operating data services.
+ *
+ * @since 5.0
+ */
+enum DataLinkSetUpType {
+    /* Request to establish a data connection. */
+    ESTABLISH_DATA_CONNECTION = 1,
+
+    /* Request to release a data connection. */
+    RELEASE_DATA_CONNECTION   = 2
+};
+
+enum DataConnectionState {
+    DATA_CONNECTION_DISCONNECTED = 1,
+    DATA_CONNECTION_CONNECTED = 2,
+};
+
+/*
+ * @brief Defines the cell id type.
+ *
+ * @since 5.0
+ */
+enum CellIdType {
+    CELLID_TYPE_GSM   = 1,
+    CELLID_TYPE_UMTS  = 2,
+    CELLID_TYPE_LTE   = 3,
+    CELLID_TYPE_NR    = 4,
+};
+
+/*
+ * @brief Defines the setid type.
+ *
+ * @since 5.0
+ */
+enum SubscriberSetIdType {
+    AGNSS_SETID_TYPE_NULL = 0,
+    AGNSS_SETID_TYPE_IMSI = 1,
+    AGNSS_SETID_TYPE_MSISDN = 2,
+};
+
+/*
+ * @brief Defines the APN IP type.
+ *
+ * @since 5.0
+ */
+enum ApnIpCategory {
+    APN_CATEGORY_INVALID = 0,
+    APN_CATEGORY_IPV4 = 1,
+    APN_CATEGORY_IPV6 = 2,
+    APN_CATEGORY_IPV4V6 = 3
+};
+
+/*
+ * @brief Defines the cell information structure in the AGNSS reference information.
+ *
+ * @since 5.0
+ */
+struct AGnssRefCellId {
+    enum CellIdType type;
+
+    /* Mobile Country Code. */
+    unsigned short mcc;
+
+    /* Mobile Network Code. */
+    unsigned short mnc;
+
+    /* Location Area Code in 2G, 3G and LTE. */
+    unsigned short lac;
+
+    /* Cell id in 2G. Utran Cell id in 3G. Cell Global Id EUTRA in LTE. */
+    unsigned int cid;
+
+    /* Tracking Area Code in LTE. */
+    unsigned short tac;
+
+    /* Physical Cell id in LTE. */
+    unsigned short pcid;
+
+    /* NR Cell ID */
+    unsigned int nci;
+};
+
+/*
+ * @brief Defines the AGNSS server information.
+ *
+ * @since 5.0
+ */
+struct AGnssServerInfo {
+    enum AGnssUserPlaneProtocol type;
+    String server;
+    int port;
+};
+
+/*
+ * @brief Defines the AGNSS setid information.
+ *
+ * @since 5.0
+ */
+struct SubscriberSetId {
+    enum SubscriberSetIdType type;
+    String id;
+};
+
+/*
+ * @brief Defines the AGNSS mac information.
+ *
+ * @since 5.0
+ */
+struct AGnssRefMac {
+    unsigned char[] mac;
+};
+
+/*
+ * @brief Defines the AGNSS reference information structure.
+ *
+ * @since 5.0
+ */
+struct AGnssRefInfo {
+    enum AGnssRefInfoType type;
+    struct AGnssRefCellId cellId;
+    struct AGnssRefMac mac;
+};
+
+/*
+ * @brief Defines the structure of the request for operating the data service.
+ *
+ * @since 5.0
+ */
+struct AGnssDataLinkRequest {
+    enum AGnssUserPlaneProtocol agnssType;
+    enum DataLinkSetUpType setUpType;
+    unsigned char[] serverIpAddr;
+    unsigned char[] serverIpV6Addr;
+};
+
+/*
+ * @brief Defines the structure of Data service network state.
+ *
+ * @since 5.0
+ */
+struct NetworkState {
+    int netId;
+    enum ApnIpCategory apnIpCategory;
+    String apn;
+    enum DataConnectionState state;
+};
+/** @} */
\ No newline at end of file
diff --git a/location/agnss/v2_1/BUILD.gn b/location/agnss/v2_1/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..f50732495525e45e45a04fb6734bb41b6ee0d9d1
--- /dev/null
+++ b/location/agnss/v2_1/BUILD.gn
@@ -0,0 +1,27 @@
+# Copyright (c) 2025 Huawei Device Co., Ltd.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import("//drivers/hdf_core/adapter/uhdf2/hdi.gni")
+hdi("location_agnss") {
+  module_name = "location_agnss"
+
+  sources = [
+    "AGnssTypes.idl",
+    "IAGnssCallback.idl",
+    "IAGnssInterface.idl",
+  ]
+
+  language = "cpp"
+  subsystem_name = "hdf"
+  part_name = "drivers_interface_location_agnss"
+}
diff --git a/location/agnss/v2_1/IAGnssCallback.idl b/location/agnss/v2_1/IAGnssCallback.idl
new file mode 100644
index 0000000000000000000000000000000000000000..369d3290232e8a5f74dd897731a0ef2775211a07
--- /dev/null
+++ b/location/agnss/v2_1/IAGnssCallback.idl
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * @addtogroup HdiAGnss
+ * @{
+ *
+ * @brief Provides unified APIs for the AGNSS service.
+ *
+ * The upper layer can use the interfaces provided by this module to set the AGNSS callback, AGNSS server address,
+ * AGNSS reference information, and setId.
+ *
+ * @since 5.0
+ */
+
+/*
+ * @file IAGnssCallback.idl
+ *
+ * @brief Defines the agnss callback to request the upper layer to establish or release data services,
+ * request the upper layer to deliver setId, and request the upper layer to deliver the agnss reference information.
+ *
+ * @since 5.0
+ * @version 2.1
+ */
+
+package ohos.hdi.location.agnss.v2_1;
+
+import ohos.hdi.location.agnss.v2_1.AGnssTypes;
+
+/*
+ * @brief Defines the agnss callback to request the upper layer to establish or release data services,
+ * request the upper layer to deliver setId, and request the upper layer to deliver the agnss reference information.
+ *
+ * @since 5.0
+ */
+[callback] interface IAGnssCallback {
+    /*
+     * @brief Request the upper layer to establish or release data services.
+     *
+     * @param request Indicates the request information for operating the data service.
+     * For details, see {@link AGnssDataLinkRequest}.
+     * @return Returns <b>0</b> if send request successed; returns a negative value otherwise.
+     *
+     * @since 5.0
+     * @version 2.0
+     */
+    RequestSetUpAgnssDataLink([in] struct AGnssDataLinkRequest request);
+
+    /*
+     * @brief Request the upper layer to deliver the subscriber identity.
+     *
+     * @param type Indicates the type of setId. For details, see {@link SubscriberSetIdType}.
+     * @return Returns <b>0</b> if send request successed; returns a negative value otherwise.
+     *
+     * @since 5.0
+     * @version 2.0
+     */
+    RequestSubscriberSetId([in] enum SubscriberSetIdType type);
+
+    /*
+     * @brief Request upper-layer ingest reference information.
+     *
+     * @param type Indicates the type of reference information. For details, see {@link AGnssRefInfoType}.
+     * @return Returns <b>0</b> if send request successed; returns a negative value otherwise.
+     *
+     * @since 5.0
+     * @version 2.0
+     */
+    RequestAgnssRefInfo([in] enum AGnssRefInfoType type);
+
+    /*
+     * @brief Request the upper layer to perform DNS query.
+     *
+     * @param fqdn Indicates the domain name for DNS query.
+     * @return Returns <b>0</b> if send request successed; returns a negative value otherwise.
+     *
+     * @since 6.0
+     * @version 1.0
+     */
+    RequestSuplDns([in] String fqdn);
+}
+/** @} */
\ No newline at end of file
diff --git a/location/agnss/v2_1/IAGnssInterface.idl b/location/agnss/v2_1/IAGnssInterface.idl
new file mode 100644
index 0000000000000000000000000000000000000000..d0fc170a761f03b1490c95ebb5b115c3d0481e2a
--- /dev/null
+++ b/location/agnss/v2_1/IAGnssInterface.idl
@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * @addtogroup HdiAGnss
+ * @{
+ *
+ * @brief Provides unified APIs for the AGNSS service.
+ *
+ * The upper layer can use the interfaces provided by this module to set the AGNSS callback, AGNSS server address,
+ * AGNSS reference information, and setId.
+ *
+ * @since 5.0
+ */
+
+/*
+ * @file IAGnssInterface.idl
+ *
+ * @brief Defines the agnss interfaces to set the AGNSS callback, AGNSS server address, AGNSS reference information,
+ * and setId.
+ *
+ * @since 5.0
+ * @version 2.1
+ */
+
+package ohos.hdi.location.agnss.v2_1;
+
+import ohos.hdi.location.agnss.v2_1.IAGnssCallback;
+import ohos.hdi.location.agnss.v2_1.AGnssTypes;
+
+/*
+ * @brief Defines the agnss interfaces to set the AGNSS callback, AGNSS server address, AGNSS reference information,
+ * and setId.
+ *
+ * @since 5.0
+ */
+interface IAGnssInterface {
+    /*
+     * @brief Set the agnss callback function.
+     *
+     * @param callback Indicates the agnss callback to request the upper layer to establish or release data services,
+     * request the upper layer to deliver setId, and request the upper layer to deliver the agnss reference information.
+     * For details, see {@link IAGnssCallback}.
+     * @return Returns <b>0</b> if setup callback successed; returns a negative value otherwise.
+     *
+     * @since 5.0
+     * @version 2.0
+     */
+    SetAgnssCallback([in] IAGnssCallback callbackObj);
+
+    /*
+     * @brief Set the Agnss Server Information.
+     *
+     * @param server Indicates the AGNSS server information.
+     * For details, see {@link AGnssServerInfo}.
+     * @return Returns <b>0</b> if setup callback successed; returns a negative value otherwise.
+     *
+     * @since 5.0
+     * @version 2.0
+     */
+    SetAgnssServer([in] struct AGnssServerInfo server);
+
+    /*
+     * @brief Ingesting Reference Information.
+     *
+     * @param refInfo Indicates the AGNSS reference information structure.
+     * For details, see {@link AGnssRefInfo}.
+     * @return Returns <b>0</b> if setup callback successed; returns a negative value otherwise.
+     *
+     * @since 5.0
+     * @version 2.0
+     */
+    SetAgnssRefInfo([in] struct AGnssRefInfo refInfo);
+
+    /*
+     * @brief Set Subscriber Identity.
+     *
+     * @param id Indicates the AGNSS setid information.
+     * For details, see {@link SubscriberSetId}.
+     * @return Returns <b>0</b> if setup callback successed; returns a negative value otherwise.
+     *
+     * @since 5.0
+     * @version 2.0
+     */
+    SetSubscriberSetId([in] struct SubscriberSetId id);
+
+    /*
+     * @brief Send network state to AGNSS module.
+     *
+     * @param state Indicates the network state. For details, see {@link NetworkState}.
+     * @return Returns <b>0</b> if send successed; returns a negative value otherwise.
+     *
+     * @since 5.0
+     * @version 2.0
+     */
+    SendNetworkState([in] struct NetworkState state);
+
+    /*
+     * @brief Send ipAddr to AGNSS module.
+     *
+     * @param ipAddr Indicates the ip address.
+     * @return Returns <b>0</b> if send successed; returns a negative value otherwise.
+     *
+     * @since 6.0
+     * @version 1.0
+     */
+    SetSuplDnsResult([in] String ipAddr);
+}
+/** @} */
\ No newline at end of file