diff --git a/app/src/main/java/com/casic/app/safetreecontroller/extensions/ByteArray.kt b/app/src/main/java/com/casic/app/safetreecontroller/extensions/ByteArray.kt
index b49c20f..cd72aed 100644
--- a/app/src/main/java/com/casic/app/safetreecontroller/extensions/ByteArray.kt
+++ b/app/src/main/java/com/casic/app/safetreecontroller/extensions/ByteArray.kt
@@ -1,5 +1,7 @@
 package com.casic.app.safetreecontroller.extensions
 
+import kotlin.experimental.and
+
 /**
  * ByteArray转Hex
  * */
@@ -50,11 +52,7 @@
 
 fun ByteArray.handleCpuTemperature(): Float {
     //[1, -128, 24]
-    val x = if (this[0] < 0) {
-        this[0].toInt() and 0xFF
-    } else {
-        this[0].toInt()
-    }
+    val x = this[0] and 0xFF.toByte()
     val y = if (this[1] < 0) {
         this[1].toInt() and 0xFF
     } else {