diff --git a/interfaces/innerkits/include/syspara/parameter.h b/interfaces/innerkits/include/syspara/parameter.h
index 3a5473f4dc9d3345fedea8c36a404d924901039c..2362b01cee38d1c6021e82cee3ee69b7343d4a55 100755
--- a/interfaces/innerkits/include/syspara/parameter.h
+++ b/interfaces/innerkits/include/syspara/parameter.h
@@ -26,6 +26,7 @@ extern "C" {
 #define PARAM_VALUE_LEN_MAX  96
 #define PARAM_NAME_LEN_MAX  96
 #define OS_FULL_NAME_LEN 128
+#define MAX_VALUE_LEN 128
 #define VERSION_ID_MAX_LEN 256
 
 static const char EMPTY_STR[] = { "" };
diff --git a/interfaces/innerkits/syspara/param_comm.c b/interfaces/innerkits/syspara/param_comm.c
index 2a7f7c8b7218a9d8afe8ae0c59d5150eb2da178b..06676ff98d390a40d53e028a54c0f5a32cb523cd 100755
--- a/interfaces/innerkits/syspara/param_comm.c
+++ b/interfaces/innerkits/syspara/param_comm.c
@@ -31,6 +31,14 @@
 
 static const char *g_emptyStr = "";
 
+int IsValidValue(const char *value, unsigned int len)
+{
+    if ((value == NULL) || (strlen(value) + 1 > len)) {
+        return 0;
+    }
+    return 1;
+}
+
 int HalGetParameter(const char *key, const char *def, char *value, uint32_t len)
 {
     if ((key == NULL) || (value == NULL)) {
diff --git a/interfaces/innerkits/syspara/param_comm.h b/interfaces/innerkits/syspara/param_comm.h
index f632c6747d00946b3088adc93e5e90704c3c0704..891b0231429e08bcb69ba07af7dac77fc8905820 100755
--- a/interfaces/innerkits/syspara/param_comm.h
+++ b/interfaces/innerkits/syspara/param_comm.h
@@ -39,6 +39,7 @@ const char *GetProductModel_(void);
 const char *GetManufacture_(void);
 const char *GetSerial_(void);
 int GetDevUdid_(char *udid, int size);
+int IsValidValue(const char *value, unsigned int len);
 
 #ifdef __cplusplus
 #if __cplusplus
diff --git a/interfaces/innerkits/syspara/param_wrapper.cpp b/interfaces/innerkits/syspara/param_wrapper.cpp
index db704db62fed329470f2c5823f29f6c54b286d56..4c3eca7872d0661bd17dae708b29fa48b784bc3b 100755
--- a/interfaces/innerkits/syspara/param_wrapper.cpp
+++ b/interfaces/innerkits/syspara/param_wrapper.cpp
@@ -66,15 +66,17 @@ std::string GetParameter(const std::string& key, const std::string& def)
 {
     uint32_t size = 0;
     int ret = SystemReadParam(key.c_str(), NULL, &size);
-    if (ret != 0) {
-        return std::string(def);
-    }
-    std::vector<char> value(size + 1);
-    ret = SystemReadParam(key.c_str(), value.data(), &size);
     if (ret == 0) {
-        return std::string(value.data());
+        std::vector<char> value(size + 1);
+        ret = SystemReadParam(key.c_str(), value.data(), &size);
+        if (ret == 0) {
+            return std::string(value.data());
+        }
+    }
+    if (IsValidValue(def.c_str(), MAX_VALUE_LEN) == 1) {
+        return std::string(def);
     }
-    return std::string(def);
+    return "";
 }
 
 bool GetBoolParameter(const std::string& key, bool def)
@@ -99,16 +101,18 @@ int GetStringParameter(const std::string key, std::string &value, const std::str
 {
     uint32_t size = 0;
     int ret = SystemReadParam(key.c_str(), NULL, &size);
-    if (ret != 0) {
-        value = def;
-        return EC_FAILURE;
-    }
-    value.resize(size + 1);
-    ret = SystemReadParam(key.c_str(), const_cast<char *>(value.data()), &size);
     if (ret == 0) {
+        std::vector<char> data(size + 1);
+        ret = SystemReadParam(key.c_str(), data.data(), &size);
+        if (ret == 0) {
+            value = std::string(data.data());
+            return EC_SUCCESS;
+        }
+    }
+    if (IsValidValue(def.c_str(), MAX_VALUE_LEN) == 1) {
+        value = std::string(def);
         return EC_SUCCESS;
     }
-    value = def;
     return EC_FAILURE;
 }
 
diff --git a/services/param/BUILD.gn b/services/param/BUILD.gn
index f8c038ed450a5f4a5f7098b01f8ab7ea6cef8305..3f6488856b57368e0776426c1fba61d0d8191afc 100755
--- a/services/param/BUILD.gn
+++ b/services/param/BUILD.gn
@@ -112,7 +112,6 @@ if (defined(ohos_lite)) {
         ":lite_ohos_param_to",
       ]
       include_dirs += [ "$root_out_dir/gen/init_lite" ]
-      defines += [ "PARAM_LOAD_CFG_FROM_CODE" ]
     }
   }
 
@@ -159,7 +158,6 @@ if (defined(ohos_lite)) {
         ":lite_ohos_param_to",
       ]
       include_dirs += [ "$root_out_dir/gen/init_lite" ]
-      defines += [ "PARAM_LOAD_CFG_FROM_CODE" ]
     }
   }
 } else {
diff --git a/test/unittest/lite/BUILD.gn b/test/unittest/lite/BUILD.gn
index 792b3e5aa63561c180c199842ca1c74ddb218dde..bdb810fbc23041147186de513188c574e1ab5810 100755
--- a/test/unittest/lite/BUILD.gn
+++ b/test/unittest/lite/BUILD.gn
@@ -135,7 +135,6 @@ if (defined(ohos_lite)) {
         "//third_party/mbedtls:mbedtls",
       ]
       include_dirs += [ "$root_out_dir/gen/init_lite" ]
-      defines += [ "PARAM_LOAD_CFG_FROM_CODE" ]
     }
 
     if (ohos_kernel_type == "liteos_m") {
@@ -164,7 +163,6 @@ if (defined(ohos_lite)) {
         "//third_party/mbedtls:mbedtls",
       ]
       include_dirs += [ "$root_out_dir/gen/init_lite" ]
-      defines += [ "PARAM_LOAD_CFG_FROM_CODE" ]
     }
     if (ohos_kernel_type == "linux") {
       defines += [ "__LINUX__" ]