diff --git a/frameworks/core/interfaces/native/implementation/custom_span_peer.h b/frameworks/core/interfaces/native/implementation/custom_span_peer.h
new file mode 100644
index 0000000000000000000000000000000000000000..a935913e6e899a4741ec354573e7fe80dff19dce
--- /dev/null
+++ b/frameworks/core/interfaces/native/implementation/custom_span_peer.h
@@ -0,0 +1,30 @@
+/*
+ * 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.
+*/
+
+#pragma once
+
+
+#include "core/event/key_event.h"
+
+#include "core/components_ng/pattern/text/span/span_object.h"
+
+struct CustomSpanPeer final {
+    OHOS::Ace::RefPtr<OHOS::Ace::CustomSpan> span;
+
+protected:
+    explicit CustomSpanPeer(OHOS::Ace::RefPtr<OHOS::Ace::CustomSpan> customSpan) : span(customSpan) {}
+    ~CustomSpanPeer() = default;
+    friend OHOS::Ace::NG::PeerUtils;
+};
\ No newline at end of file
diff --git a/frameworks/core/interfaces/native/implementation/styled_string_accessor.cpp b/frameworks/core/interfaces/native/implementation/styled_string_accessor.cpp
index 32507a2e8c49a00a1cb0bf2906b437b76e22be70..dcc6f40cd03153034fb1515fb61eae97ee77cce8 100644
--- a/frameworks/core/interfaces/native/implementation/styled_string_accessor.cpp
+++ b/frameworks/core/interfaces/native/implementation/styled_string_accessor.cpp
@@ -22,6 +22,7 @@
 #include "core/interfaces/native/utility/reverse_converter.h"
 #include "core/interfaces/native/implementation/background_color_style_peer.h"
 #include "core/interfaces/native/implementation/baseline_offset_style_peer.h"
+#include "core/interfaces/native/implementation/custom_span_peer.h"
 #include "core/interfaces/native/implementation/decoration_style_peer.h"
 #include "core/interfaces/native/implementation/gesture_style_peer.h"
 #include "core/interfaces/native/implementation/image_attachment_peer.h"
@@ -163,8 +164,10 @@ Ark_StyledString CtorImpl(const Ark_Union_String_ImageAttachment_CustomSpan* val
                 auto options = peerImageAttachment->span->GetImageSpanOptions();
                 peer->spanString = AceType::MakeRefPtr<SpanString>(options);
             },
-            [](const Ark_CustomSpan& arkCustomSpan) {
-                LOGE("StyledStringAccessor::CtorImpl unsupported Ark_CustomSpan");
+            [&peer](const Ark_CustomSpan& arkCustomSpan) {
+                CustomSpanPeer* peerCustomSpan = arkCustomSpan;
+                CHECK_NULL_VOID(peerCustomSpan && peerCustomSpan->span);
+                peer->spanString = AceType::MakeRefPtr<SpanString>(peerCustomSpan->span);
             },
             []() {}
         );
diff --git a/test/unittest/capi/accessors/styled_string_accessor_test.cpp b/test/unittest/capi/accessors/styled_string_accessor_test.cpp
index ae62f00eb80aa3cf30b97b0174aaa613e5b0ca93..ba777dc56cd464bbb562414d0a254460d9d2076f 100644
--- a/test/unittest/capi/accessors/styled_string_accessor_test.cpp
+++ b/test/unittest/capi/accessors/styled_string_accessor_test.cpp
@@ -20,6 +20,7 @@
 #include "core/interfaces/native/utility/reverse_converter.h"
 #include "core/interfaces/native/implementation/background_color_style_peer.h"
 #include "core/interfaces/native/implementation/baseline_offset_style_peer.h"
+#include "core/interfaces/native/implementation/custom_span_peer.h"
 #include "core/interfaces/native/implementation/decoration_style_peer.h"
 #include "core/interfaces/native/implementation/gesture_style_peer.h"
 #include "core/interfaces/native/implementation/length_metrics_peer.h"
@@ -424,6 +425,20 @@ private:
     ImageAttachmentPeer* peer = nullptr;
 };
 
+struct StyledStringUnionCustomSpan {
+    Ark_Union_String_ImageAttachment_CustomSpan* Union()
+    {
+        peer = PeerUtils::CreatePeer<CustomSpanPeer>(AceType::MakeRefPtr<CustomSpan>());
+        static Ark_Union_String_ImageAttachment_CustomSpan value = Converter::ArkUnion<
+            Ark_Union_String_ImageAttachment_CustomSpan, Ark_CustomSpan>(peer);
+        return &value;
+    }
+    Opt_Array_StyleOptions* Styles() { return nullptr; }
+    void TearDown() {}
+private:
+    CustomSpanPeer* peer = nullptr;
+};
+
 template <typename V1>
 class StyledStringAccessorTest : public AccessorTestCtorBase<GENERATED_ArkUIStyledStringAccessor,
     &GENERATED_ArkUIAccessors::getStyledStringAccessor, StyledStringPeer> {
@@ -487,6 +502,7 @@ private:
 using StyledStringAccessorUnionNullTest = StyledStringAccessorTest<StyledStringUnionNull>;
 using StyledStringAccessorUnionStringTest = StyledStringAccessorTest<StyledStringUnionString>;
 using StyledStringAccessorUnionImageAttachmentTest = StyledStringAccessorTest<StyledStringUnionImageAttachment>;
+using StyledStringAccessorUnionCustomSpanTest = StyledStringAccessorTest<StyledStringUnionCustomSpan>;
 
 /**
  * @tc.name: peerSucceeded
@@ -1115,4 +1131,23 @@ HWTEST_F(StyledStringAccessorUnionImageAttachmentTest, ctorImageAttachmentTest,
     auto paddingStr = imageAttribute.value().paddingProp.value().ToString();
     EXPECT_EQ(paddingStr, TEST_LENGTHMETRICS_STR);
 }
+
+/**
+ * @tc.name: ctorCustomSpanTest
+ * @tc.desc: CustomSpan check
+ * @tc.type: FUNC
+ */
+HWTEST_F(StyledStringAccessorUnionCustomSpanTest, ctorCustomSpanTest, TestSize.Level1)
+{
+    ASSERT_NE(peer_->spanString, nullptr);
+    auto spans = peer_->spanString->GetSpans(0, 1);
+    ASSERT_EQ(spans.size(), 1);
+    auto customSpan = AceType::DynamicCast<CustomSpan>(spans[0]);
+    ASSERT_NE(customSpan, nullptr);
+    EXPECT_EQ(customSpan->ToString(), "CustomSpan [0:1]");
+    EXPECT_EQ(customSpan->GetLength(), 1);
+    EXPECT_EQ(customSpan->GetStartIndex(), 0);
+    EXPECT_EQ(customSpan->GetEndIndex(), 1);
+    EXPECT_EQ(customSpan->GetSpanType(), SpanType::CustomSpan);
+}
 } // namespace OHOS::Ace::NG