diff --git a/tongran-common/tongran-common-core/src/main/java/com/tongran/common/core/utils/UnitChangeUtil.java b/tongran-common/tongran-common-core/src/main/java/com/tongran/common/core/utils/UnitChangeUtil.java
index 8317472..e360b1d 100644
--- a/tongran-common/tongran-common-core/src/main/java/com/tongran/common/core/utils/UnitChangeUtil.java
+++ b/tongran-common/tongran-common-core/src/main/java/com/tongran/common/core/utils/UnitChangeUtil.java
@@ -168,4 +168,24 @@ public class UnitChangeUtil {
 
         return String.format("%.2f %s", roundedValue, units[unitIndex]);
     }
+    public static String convertUnitByValue(Long value) {
+        if (value == null || value == 0) {
+            return "0 Kb";
+        }
+
+        // 注意：这里使用二进制单位（1024）
+        if (value >= 1024L * 1024 * 1024 * 1024) {
+            double result = value / (1024.0 * 1024 * 1024 * 1024);
+            return String.format("%.2f Tb", result);
+        } else if (value >= 1024L * 1024 * 1024) {  // >= 1GB
+            double result = value / (1024.0 * 1024 * 1024);
+            return String.format("%.2f Gb", result);
+        } else if (value >= 1024L * 1024) {         // >= 1MB
+            double result = value / (1024.0 * 1024);
+            return String.format("%.2f Mb", result);
+        } else {
+            double result = value / 1024.0;
+            return String.format("%.2f Kb", result);
+        }
+    }
 }