diff --git a/modules/JiShe.CollectBus.IoTDB/Provider/IoTDBProvider.cs b/modules/JiShe.CollectBus.IoTDB/Provider/IoTDBProvider.cs
index a1a69a8..e9f624b 100644
--- a/modules/JiShe.CollectBus.IoTDB/Provider/IoTDBProvider.cs
+++ b/modules/JiShe.CollectBus.IoTDB/Provider/IoTDBProvider.cs
@@ -897,7 +897,7 @@ namespace JiShe.CollectBus.IoTDB.Provider
                 ["DATETIME"] = TSDataType.TIMESTAMP,
                 ["DATE"] = TSDataType.DATE,
                 ["BLOB"] = TSDataType.BLOB,
-                ["DECIMAL"] = TSDataType.STRING,
+                ["DECIMAL"] = TSDataType.FLOAT,
                 ["STRING"] = TSDataType.STRING
             };