diff --git a/hiviewdfx/hilog/include/hilog/log.h b/hiviewdfx/hilog/include/hilog/log.h
index 1c4cda70470867aa3a89f12d025251f6c9742567..0aa747734a09aae4cdb54d2607e8674d49aff9ad 100644
--- a/hiviewdfx/hilog/include/hilog/log.h
+++ b/hiviewdfx/hilog/include/hilog/log.h
@@ -133,6 +133,30 @@ typedef enum {
     LOG_FATAL = 7,
 } LogLevel;
 
+/**
+ * @brief Enumerates preference strategy to be used in {@link OH_LOG_SetLogLevel}.
+ *
+ * You are advised to select preference strategy based on their respective usage scenarios.
+ *
+ * @since 21
+ */
+typedef enum {
+    /** Used to unset SetLogLevel, then none is set
+     */
+    UNSET_LOGLEVEL = 0,
+    /**
+     * The actual lowest log level is determined by
+     * the maximum level between the new level and the system-controlled level.
+     * This is equivalent to calling OH_LOG_SetMinLogLevel.
+     */
+    PREFER_CLOSE_LOG = 1,
+    /**
+     * The actual lowest log level is determined by
+     * the minimum level between the new level and the system-controlled level.
+     */
+    PREFER_OPEN_LOG = 2,
+} PreferStrategy;
+
 /**
  * @brief Outputs logs.
  *
@@ -351,6 +375,15 @@ void OH_LOG_SetCallback(LogCallback callback);
  */
 void OH_LOG_SetMinLogLevel(LogLevel level);
 
+/**
+ * @brief Sets the lowest log level of the current application process. Different preference strategy can be set.
+ *
+ * @param level log level.
+ * @param prefer preference strategy. See {@link PreferStrategy}.
+ * @since 21
+ */
+void OH_LOG_SetLogLevel(LogLevel level, PreferStrategy prefer);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/hiviewdfx/hilog/libhilog.ndk.json b/hiviewdfx/hilog/libhilog.ndk.json
index 0d14010e04c1ea7dffaef8c2a1e89a2dc7a6e037..2f06e93a984744041fa91f00fe9b0f2ec28afb60 100644
--- a/hiviewdfx/hilog/libhilog.ndk.json
+++ b/hiviewdfx/hilog/libhilog.ndk.json
@@ -19,5 +19,9 @@
     },
     {
         "name": "OH_LOG_SetMinLogLevel"
+    },
+    {
+        "first_instroduced":"21",
+        "name": "OH_LOG_SetLogLevel"
     }
 ]