diff --git a/BUILD.gn b/BUILD.gn
index c703e73b4015b56d04e74aa942a7cbcccf11ec90..fa0a209d8f94e4e78cf29dd400d2c3aee73d6bfb 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -43,7 +43,7 @@ action("build_ets_loader_library") {
   deps = [
     ":components",
     ":form_components",
-    ":install_arkguard_tsc",
+    ":install_arkguard_tsc_declgen",
     ":server",
   ]
   script = "build_ets_loader_library.py"
@@ -171,7 +171,7 @@ ets_loader_sources = [
 ohos_copy("ets_loader") {
   deps = [
     ":build_ets_loader_library",
-    ":install_arkguard_tsc",
+    ":install_arkguard_tsc_declgen",
   ]
   sources = ets_loader_sources
   deps += [ ":build_ets_sysResource" ]
@@ -258,7 +258,7 @@ ohos_copy("ets_loader_declaration") {
 ohos_copy("ets_loader_ark") {
   deps = [
     ":build_ets_loader_library",
-    ":install_arkguard_tsc",
+    ":install_arkguard_tsc_declgen",
   ]
   sources = ets_loader_sources
   deps += [ ":build_ets_sysResource" ]
@@ -352,18 +352,22 @@ ohos_copy("ets_loader_ark_hap") {
 typescript_dir = get_label_info("//third_party/typescript:build_typescript",
                                 "target_out_dir")
 
-action("install_arkguard_tsc") {
+action("install_arkguard_tsc_declgen") {
+  static_core = "//arkcompiler/runtime_core/static_core"
   deps = [
+    "${static_core}/plugins/ets/tools/declgen_ts2sts:build_declgen",
     "//arkcompiler/ets_frontend/arkguard:build_arkguard",
     "//third_party/typescript:build_typescript",
   ]
-  script = "install_arkguard_tsc.py"
+  script = "install_arkguard_tsc_declgen.py"
   args = [
     rebase_path("${typescript_dir}/ohos-typescript-4.9.5-r4.tgz"),
     rebase_path(
         "${root_out_dir}/obj/arkcompiler/ets_frontend/arkguard/arkguard-1.1.3.tgz"),
     rebase_path("//developtools/ace_ets2bundle/compiler"),
     current_os,
+    rebase_path(
+        "${root_out_dir}/obj/arkcompiler/runtime_core/static_core/plugins/ets/tools/declgen_ts2sts/panda-declgen-1.0.0.tgz"),
   ]
   outputs = [ "${target_out_dir}/${target_name}.stamp" ]
 }
diff --git a/compiler/script/install_declgen.sh b/compiler/script/install_declgen.sh
new file mode 100755
index 0000000000000000000000000000000000000000..ca35365e44c76bfe92c8df4734ac8d3c1116b7a4
--- /dev/null
+++ b/compiler/script/install_declgen.sh
@@ -0,0 +1,58 @@
+#!/bin/bash
+# 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.
+
+#!/bin/bash
+set -e
+
+if [ ! -d "../compiler" ]; then
+    echo "Error: must run this script in ace_ets2bundle/compiler root directory"
+    exit 1
+fi
+
+oriDir=$(pwd)
+
+DECLGEN_ROOT_DIR="../../../arkcompiler/runtime_core/static_core/plugins/ets/tools/declgen_ts2sts"
+
+cd "$DECLGEN_ROOT_DIR" || { echo "Failed to change directory to $DECLGEN_ROOT_DIR"; exit 1; }
+
+npm install
+npm run build
+
+# Generate the npm package using `npm pack`
+if npm pack; then
+    tarball=$(ls *.tgz)  # Get the generated tarball file name
+    if [ -f "$tarball" ]; then
+        # Move the tarball to the original directory
+        mv "$tarball" "$oriDir/"
+
+        # Go back to the original directory and extract the tarball
+        cd "$oriDir"
+        tar -xvzf "$tarball"
+
+        # Rename the extracted directory (assuming it is named after the package)
+        extracted_dir=$(tar -tf "$tarball" | head -n 1 | cut -f1 -d"/")  # Get the extracted folder name
+        mv "$extracted_dir" "./node_modules/declgen"  # Rename to 'declgen'
+
+        # Optionally, remove the tarball after extraction
+        rm "$tarball"
+
+        echo "Build successfully packed, extracted, and renamed to 'declgen' in $oriDir"
+    else
+        echo "Error: No tarball found, cannot proceed"
+        exit 1
+    fi
+else
+    echo "Error: npm pack failed"
+    exit 1
+fi
diff --git a/compiler/src/ets_checker.ts b/compiler/src/ets_checker.ts
index 7a4bf0a73945a27eee6f515afec16ead3dd2afc5..76e31bebb19ef5ad41cecac255d9dc70ab5df8e6 100644
--- a/compiler/src/ets_checker.ts
+++ b/compiler/src/ets_checker.ts
@@ -94,6 +94,10 @@ import {
   getJsDocNodeConditionCheckResult
 } from './fast_build/system_api/api_check_utils';
 import { sourceFileDependencies } from './fast_build/ark_compiler/common/ob_config_resolver';
+import {
+  RunnerParms,
+  generateInteropDecls
+} from '../node_modules/declgen/build/src/generateInteropDecls'
 
 export interface LanguageServiceCache {
   service?: ts.LanguageService;
@@ -518,7 +522,9 @@ export function serviceChecker(rootFileNames: string[], newLogger: Object = null
   if (process.env.watchMode !== 'true') {
     processBuildHap(cacheFile, rootFileNames, compilationTime, rollupShareObject);
   }
-
+  if (rollupShareObject?.projectConfig.mixCompile) {
+    generateDeclarationFileForSTS(rootFileNames, allResolvedModules);
+  }
   if (globalProgram.program &&
     (process.env.watchMode !== 'true' && !projectConfig.isPreview &&
       !projectConfig.hotReload && !projectConfig.coldReload)) {
@@ -1672,3 +1678,29 @@ export function resetEtsCheck(): void {
   targetESVersionChanged = false;
   fileToIgnoreDiagnostics = undefined;
 }
+
+export function generateDeclarationFileForSTS(rootFileNames: string[], allResolvedModules: Set<string>) {
+  if (!(projectConfig.compileHar || projectConfig.compileShared)) {
+    return;
+  }
+  const unixRootFileNames = rootFileNames.map(path => {
+    return toUnixPath(path);
+  });
+
+  const uniqueFiles = Array.from(new Set([
+    ...unixRootFileNames,
+    ...allResolvedModules
+  ]));
+
+  const config: RunnerParms = {
+    inputDirs: [],
+    inputFiles: uniqueFiles,
+    outDir: path.resolve(projectConfig.aceModuleBuild, '../etsFortgz/ets'),
+    rootDir: projectConfig.projectRootPath,
+    customResolveModuleNames: resolveModuleNames
+  };
+  if (fs.existsSync(config.outDir)) {
+    fs.rmSync(config.outDir, { recursive: true, force: true });
+  }
+  generateInteropDecls(config);
+}
\ No newline at end of file
diff --git a/install_arkguard_tsc.py b/install_arkguard_tsc_declgen.py
similarity index 96%
rename from install_arkguard_tsc.py
rename to install_arkguard_tsc_declgen.py
index 61284e51e238b9680f46aa20aedd8a62681fb525..5fb5d0c1b304d1d4ad2fda777873999e1a791550 100755
--- a/install_arkguard_tsc.py
+++ b/install_arkguard_tsc_declgen.py
@@ -54,10 +54,11 @@ def run(args):
     arkguard_path = args[1]
     source_path = args[2]
     current_os = args[3]
+    declgen_path = args[4]
     node_modules_path = os.path.join(source_path, "node_modules")
     extract(tsc_path, node_modules_path, 'typescript', current_os)
     extract(arkguard_path, node_modules_path, 'arkguard', current_os)
-
+    extract(declgen_path, node_modules_path, 'declgen', current_os)
 
 if __name__ == "__main__":
     run(sys.argv[1:])
\ No newline at end of file