diff --git a/partitionslot/bundle.json b/partitionslot/bundle.json
index fc65eb3daf50a9f32ec36f12f925d9fccb3bca32..3df8e19152c0697bd2f25fe8e0291a769d80926c 100644
--- a/partitionslot/bundle.json
+++ b/partitionslot/bundle.json
@@ -1,7 +1,7 @@
 {
   "name": "@ohos/drivers_interface_partitionslot",
   "description": "partitionslot device driver interface",
-  "version": "3.2",
+  "version": "5.1",
   "license": "Apache License 2.0",
   "publishAs": "code-segment",
   "segment": {
@@ -26,13 +26,13 @@
     },
     "build": {
       "sub_component": [
-        "//drivers/interface/partitionslot/v1_0:partitionslot_idl_target"
+        "//drivers/interface/partitionslot/v1_1:partitionslot_idl_target"
       ],
       "test": [
       ],
       "inner_kits": [
         {
-          "name": "//drivers/interface/partitionslot/v1_0:libpartitionslot_proxy_1.0",
+          "name": "//drivers/interface/partitionslot/v1_1:libpartitionslot_proxy_1.1",
           "header": {
             "header_files": [
             ],
@@ -40,7 +40,7 @@
           }
         },
         {
-          "name": "//drivers/interface/partitionslot/v1_0:partitionslot_idl_headers",
+          "name": "//drivers/interface/partitionslot/v1_1:libpartitionslot_stub_1.1",
           "header": {
             "header_files": [
             ],
@@ -48,7 +48,7 @@
           }
         },
         {
-          "name": "//drivers/interface/partitionslot/v1_0:libpartitionslot_stub_1.0",
+          "name": "//drivers/interface/partitionslot/v1_1:partitionslot_idl_headers",
           "header": {
             "header_files": [
             ],
diff --git a/partitionslot/v1_1/BUILD.gn b/partitionslot/v1_1/BUILD.gn
new file mode 100755
index 0000000000000000000000000000000000000000..4a7189624556dd416a681405034f22fccb8772d1
--- /dev/null
+++ b/partitionslot/v1_1/BUILD.gn
@@ -0,0 +1,23 @@
+# 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("partitionslot") {
+  module_name = "partitionslot_interface_service"
+  sources = [ "IPartitionSlot.idl" ]
+
+  language = "cpp"
+  subsystem_name = "hdf"
+  part_name = "drivers_interface_partitionslot"
+}
\ No newline at end of file
diff --git a/partitionslot/v1_1/IPartitionSlot.idl b/partitionslot/v1_1/IPartitionSlot.idl
new file mode 100755
index 0000000000000000000000000000000000000000..f7ba88e4eea43ee8a6e6fcc2e980b09f97c461df
--- /dev/null
+++ b/partitionslot/v1_1/IPartitionSlot.idl
@@ -0,0 +1,114 @@
+/*
+ * 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 HdfPartitionSlot
+ *
+ * @brief Provides APIs for the partionton slot service.
+ *
+ * The PartitionSlot module provides a unified interface for PartitionSlot service.
+ * After obtaining the driver object or proxy, the realted APIs can be used to
+ * obtain current booting partition slot, update current booting partition slot,
+ * or set partition slot as unbootable.
+ * @since 5.1
+ */
+
+/**
+ * @file IPartitionSlot.idl
+ *
+ * @brief Declares common APIs of the PartitionSlot service.
+ * These APIs can be used to obtain current booting partition slot,
+ * or update current booting partition slot, or set partition slot as unbootable.
+ * @since 5.1
+ */
+
+/**
+ * @brief Defines the basic operations that can be performed on PartitionSlot.
+ *
+ * The operations include getting and setting current booting partition slot,
+ */
+
+package ohos.hdi.partitionslot.v1_1;
+
+
+interface IPartitionSlot {
+    /**
+     * @brief Obtains current booting partition slot.
+     *
+     * @param numOfSlots number of slots supported. 1 means no AB partition; 2 means AB, > 2 means multiple slots
+     * @return Returns <b>-1</b> if the board does not support AB Parittion.
+     * @return Returns <b>0</b> if the board is booting from partition slot A.
+     * @return Returns <b>1</b> if the board is booting from partition slot B.
+     * @return Returns <b>N</b> if the board is booting from partition slot N.
+     *
+     * @since 3.1
+     */
+    GetCurrentSlot([out] int currentSlot, [out] int numOfSlots);
+
+    /**
+     * @brief Obtains slot suffix string from slot id
+     *
+     * @param slot slot index.
+     * @param suffix slot suffix string.
+     * @return Returns <b>-1</b> if the board does not support AB Parittion.
+     * @return Returns <b>0</b> if the operation is successful.
+     *
+     * @since 3.1
+     */
+    GetSlotSuffix([in] int slot, [out] String suffix);
+
+    /**
+     * @brief Set current active boot partition slot
+     *
+     * @param slot slot index.
+     * @return Returns <b>0</b> if the operation is successful.
+     * @return Returns a negative value if the operation fails.
+     *
+     * @since 3.1
+     */
+    SetActiveSlot([in] int slot);
+
+    /**
+     * @brief Set boot partition slot unbootable
+     *
+     * @param slot slot index.
+     * @return Returns <b>0</b> if the operation is successful.
+     * @return Returns a negative value if the operation fails.
+     *
+     * @since 3.1
+     */
+    SetSlotUnbootable([in] int slot);
+
+    /**
+     * @brief Get checkpoint
+     *
+     * @return Returns <b>-1</b> if the OTA is executing.
+     * @return Returns <b>0</b> if the OTA is not executing.
+     *
+     * @since 5.1
+     * @version 1.0
+     */
+    GetCheckpoint([out] int checkpoint);
+
+    /**
+     * @brief Set checkpoint
+     *
+     * @param checkpoint checkpoint index.
+     *
+     * @since 5.1
+     * @version 1.0
+     */   
+    SetCheckpoint([in] int checkpoint);
+}
\ No newline at end of file