diff --git a/core/function-impl/mogo-core-function-hmi/src/main/java/com/mogo/eagle/core/function/hmi/ui/operate/preferences/PreferenceWithSpeedSetting.kt b/core/function-impl/mogo-core-function-hmi/src/main/java/com/mogo/eagle/core/function/hmi/ui/operate/preferences/PreferenceWithSpeedSetting.kt
index c5bd5d3df5..f990d1e229 100644
--- a/core/function-impl/mogo-core-function-hmi/src/main/java/com/mogo/eagle/core/function/hmi/ui/operate/preferences/PreferenceWithSpeedSetting.kt
+++ b/core/function-impl/mogo-core-function-hmi/src/main/java/com/mogo/eagle/core/function/hmi/ui/operate/preferences/PreferenceWithSpeedSetting.kt
@@ -2,23 +2,18 @@ package com.mogo.eagle.core.function.hmi.ui.operate.preferences
 
 import android.annotation.SuppressLint
 import android.content.Context
-import android.text.Editable
 import android.util.AttributeSet
 import android.widget.EditText
 import android.widget.TextView
 import androidx.core.widget.doAfterTextChanged
-import androidx.core.widget.doBeforeTextChanged
-import androidx.core.widget.doOnTextChanged
 import androidx.preference.Preference
 import androidx.preference.PreferenceViewHolder
 import com.mogo.eagle.core.function.hmi.R
 import com.mogo.eagle.core.utilcode.kotlin.onClick
 import com.mogo.eagle.core.utilcode.kotlin.onClickWidthDuration
-import com.mogo.eagle.core.utilcode.mogo.logger.Logger
 import com.mogo.eagle.core.utilcode.util.ToastUtils
 import java.math.BigDecimal
 import java.util.concurrent.ConcurrentHashMap
-import kotlin.math.max
 
 class PreferenceWithSpeedSetting : Preference {
 
@@ -74,7 +69,7 @@ class PreferenceWithSpeedSetting : Preference {
         if (cache.containsKey(key)) {
             cur = cache[key] ?: cur
         }
-        cur = BigDecimal.valueOf(cur).setScale(1).toDouble()
+        cur = cur.safeScale()
         if (speedLimit is EditText) {
             speedLimit.setText(cur.toString())
             speedLimit.doAfterTextChanged { text ->
@@ -89,14 +84,13 @@ class PreferenceWithSpeedSetting : Preference {
                     btnOk.isEnabled = false
                     holder.itemView.isEnabled =  false
                     ll.isSelected = false
-                    ToastUtils.showShort("阈值最大为${BigDecimal.valueOf(max).setScale(1)}$unit")
+                    ToastUtils.showShort("阈值最大为${max.safeScale()}$unit")
                     return@doAfterTextChanged
                 }
-                val temp = BigDecimal.valueOf(current).setScale(1).toDouble()
+                val temp = current.safeScale()
                 if (cur == temp) {
                     return@doAfterTextChanged
                 }
-                Logger.d("RWJ", "--- cache ---- 2 ---: $cur, $temp")
                 cur = temp
                 btnOk.isEnabled = true
                 ll.isSelected = true
@@ -115,7 +109,7 @@ class PreferenceWithSpeedSetting : Preference {
         minus.onClickWidthDuration(100) {
             val minusAfter = cur - step
             if (minusAfter < min) {
-                ToastUtils.showShort("阈值最小为${BigDecimal.valueOf(min).setScale(1)}$unit")
+                ToastUtils.showShort("阈值最小为${min.safeScale()}$unit")
                 return@onClickWidthDuration
             }
             cur = minusAfter
@@ -135,7 +129,7 @@ class PreferenceWithSpeedSetting : Preference {
         add.onClickWidthDuration(100) {
             val addAfter = cur + step
             if (addAfter > max) {
-                ToastUtils.showShort("阈值最大为${BigDecimal.valueOf(max).setScale(1)}$unit")
+                ToastUtils.showShort("阈值最大为${max.safeScale()}$unit")
                 return@onClickWidthDuration
             }
             holder.itemView.isEnabled = false
@@ -159,4 +153,8 @@ class PreferenceWithSpeedSetting : Preference {
             }
         }
     }
+
+    private fun Double.safeScale(s: Int = 1): Double {
+        return runCatching { BigDecimal.valueOf(this).setScale(s).toDouble() }.getOrNull() ?: this
+    }
 }
\ No newline at end of file