diff --git a/app/src/main/java/com/yinuo/safetywatcher/watcher/port/ParseHelper.kt b/app/src/main/java/com/yinuo/safetywatcher/watcher/port/ParseHelper.kt
index 9935cbf..1a0a03b 100644
--- a/app/src/main/java/com/yinuo/safetywatcher/watcher/port/ParseHelper.kt
+++ b/app/src/main/java/com/yinuo/safetywatcher/watcher/port/ParseHelper.kt
@@ -12,8 +12,12 @@ import com.common.serialport.utils.HexUtils
 import com.yinuo.safetywatcher.watcher.bean.GasReqBean
 import com.yinuo.safetywatcher.watcher.constant.GAS_CLOUD_UPLOAD_SIZE_ONCE
 import com.yinuo.safetywatcher.watcher.net.DevicesApi
+import com.yinuo.safetywatcher.watcher.port.cmd.CH4
+import com.yinuo.safetywatcher.watcher.port.cmd.CH4_LEL2PPMFACTOR
 import com.yinuo.safetywatcher.watcher.port.cmd.GasPortStatus
 import com.yinuo.safetywatcher.watcher.port.cmd.GasTypeEnum
+import com.yinuo.safetywatcher.watcher.port.cmd.H2
+import com.yinuo.safetywatcher.watcher.port.cmd.H2_LEL2PPMFACTOR
 import com.yinuo.safetywatcher.watcher.port.cmd.O2
 import com.yinuo.safetywatcher.watcher.port.cmd.ResponseHelper
 import com.yinuo.safetywatcher.watcher.port.cmd.getGasTypeEnumByCode
@@ -33,6 +37,7 @@ object ParseHelper {
         DevicesApi()
     }
     private val gasMap = hashMapOf<String, Gas>()
+    private val unConvertValueMap = hashMapOf<String, Float>()
 
     fun parse(it: ByteArray, index: Byte) {
         try {
@@ -120,6 +125,7 @@ object ParseHelper {
 
         value = correctValueByOtherGas(type, value)
         LogUtils.w("receive msg 多气体矫正后 $type, 浓度 = $value $unit")
+        unConvertValueMap[type.desc] = value
 
         //根据单位进行数值转换
         val localGasUnit = getLocalGasUnit(type.desc)
@@ -301,21 +307,28 @@ object ParseHelper {
      * 根据其他气体修正当前气体值
      *
      * @param type  类型
-     * @param value 当前值
+     * @param oriValue 当前值
      * @return 修正后的值
      */
-    private fun correctValueByOtherGas(type: GasTypeEnum, value: Float): Float {
+    private fun correctValueByOtherGas(type: GasTypeEnum, oriValue: Float): Float {
         var offset = 0f
-        if (gasMap.isNotEmpty()) {
-            gasMap.forEach { entry ->
-                val gas = entry.value
-                val coefficient = getInfluenceCoefficient(type, gas.gasName)
-                if (gas.gasValue > 0f && coefficient != 0f) {
-                    offset += gas.gasValue * coefficient
+        if (unConvertValueMap.isNotEmpty()) {
+            unConvertValueMap.forEach { entry ->
+                val gasValue = entry.value
+                val nameKey = entry.key
+                val coefficient = getInfluenceCoefficient(type, nameKey)
+                if (gasValue > 0f && coefficient != 0f) {
+                    // h2和Ch4需要先转换成ppm，再参与计算
+                    offset += if (H2 == nameKey || CH4 == nameKey) {
+                        val factor = if (H2 == nameKey) H2_LEL2PPMFACTOR else CH4_LEL2PPMFACTOR
+                        lel2ppm(gasValue, factor) * coefficient
+                    } else {
+                        gasValue * coefficient
+                    }
                 }
             }
         }
-        return value + offset
+        return oriValue + offset
     }
 
     /**