diff --git a/app/src/main/java/com/casic/smarttube/extensions/LineChart.kt b/app/src/main/java/com/casic/smarttube/extensions/LineChart.kt
index 65af8cb..82996e8 100644
--- a/app/src/main/java/com/casic/smarttube/extensions/LineChart.kt
+++ b/app/src/main/java/com/casic/smarttube/extensions/LineChart.kt
@@ -5,7 +5,6 @@
 import com.github.mikephil.charting.animation.Easing
 import com.github.mikephil.charting.charts.Chart
 import com.github.mikephil.charting.charts.LineChart
-import com.github.mikephil.charting.components.Legend
 import com.github.mikephil.charting.components.XAxis
 import com.github.mikephil.charting.components.YAxis
 import com.pengxh.kt.lite.extensions.convertColor
@@ -24,6 +23,7 @@
     rightAxis.isEnabled = false
     val leftAxis: YAxis = this.axisLeft
     leftAxis.axisMinimum = 0f
+    leftAxis.axisMaximum = 100f
     this.isScaleXEnabled = true //X轴可缩放
     this.isScaleYEnabled = false //Y轴不可缩放
     //设置x轴
@@ -36,14 +36,10 @@
     xAxis.setDrawGridLines(true) //设置x轴上每个点对应的线
     xAxis.granularity = 1f //禁止放大后x轴标签重绘
     xAxis.position = XAxis.XAxisPosition.BOTTOM
+    xAxis.labelRotationAngle = -45f
     this.extraBottomOffset = 5f //解决X轴显示不完全问题
     //去掉描述
     this.description.isEnabled = false
-    //设置图例
-    val legend = this.legend
-    legend.orientation = Legend.LegendOrientation.HORIZONTAL
-    legend.verticalAlignment = Legend.LegendVerticalAlignment.BOTTOM
-    legend.horizontalAlignment = Legend.LegendHorizontalAlignment.CENTER
-    //图例是否自动换行
-    legend.isWordWrapEnabled = true
+    //去掉图例
+    this.legend.isEnabled = false
 }
\ No newline at end of file

diff --git a/app/src/main/java/com/casic/smarttube/extensions/LineChart.kt b/app/src/main/java/com/casic/smarttube/extensions/LineChart.kt
index 65af8cb..82996e8 100644
--- a/app/src/main/java/com/casic/smarttube/extensions/LineChart.kt
+++ b/app/src/main/java/com/casic/smarttube/extensions/LineChart.kt
@@ -5,7 +5,6 @@
 import com.github.mikephil.charting.animation.Easing
 import com.github.mikephil.charting.charts.Chart
 import com.github.mikephil.charting.charts.LineChart
-import com.github.mikephil.charting.components.Legend
 import com.github.mikephil.charting.components.XAxis
 import com.github.mikephil.charting.components.YAxis
 import com.pengxh.kt.lite.extensions.convertColor
@@ -24,6 +23,7 @@
     rightAxis.isEnabled = false
     val leftAxis: YAxis = this.axisLeft
     leftAxis.axisMinimum = 0f
+    leftAxis.axisMaximum = 100f
     this.isScaleXEnabled = true //X轴可缩放
     this.isScaleYEnabled = false //Y轴不可缩放
     //设置x轴
@@ -36,14 +36,10 @@
     xAxis.setDrawGridLines(true) //设置x轴上每个点对应的线
     xAxis.granularity = 1f //禁止放大后x轴标签重绘
     xAxis.position = XAxis.XAxisPosition.BOTTOM
+    xAxis.labelRotationAngle = -45f
     this.extraBottomOffset = 5f //解决X轴显示不完全问题
     //去掉描述
     this.description.isEnabled = false
-    //设置图例
-    val legend = this.legend
-    legend.orientation = Legend.LegendOrientation.HORIZONTAL
-    legend.verticalAlignment = Legend.LegendVerticalAlignment.BOTTOM
-    legend.horizontalAlignment = Legend.LegendHorizontalAlignment.CENTER
-    //图例是否自动换行
-    legend.isWordWrapEnabled = true
+    //去掉图例
+    this.legend.isEnabled = false
 }
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_history_data.xml b/app/src/main/res/layout/activity_history_data.xml
index f6fd64d..a2a3442 100644
--- a/app/src/main/res/layout/activity_history_data.xml
+++ b/app/src/main/res/layout/activity_history_data.xml
@@ -24,7 +24,7 @@
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:paddingVertical="@dimen/dp_10"
-            android:text="历史数据"
+            android:text="浓度历史数据"
             android:textColor="@color/mainTextColor"
             android:textSize="@dimen/sp_16" />