diff --git a/PressureMonitor.cpp b/PressureMonitor.cpp
new file mode 100644
index 0000000..9ff7922
--- /dev/null
+++ b/PressureMonitor.cpp
@@ -0,0 +1,41 @@
+#include "PressureMonitor.h"
+#include <cmath>
+
+PressureMonitor::PressureMonitor()
+    : m_stableTickCount(0)
+{
+}
+
+bool PressureMonitor::tick(float realtimePressure, float calibratedPressure)
+{
+    if (calibratedPressure <= 0.0f) {
+        m_stableTickCount = 0;
+        return false;
+    }
+
+    float upperBound = calibratedPressure + 10.0f;
+    float lowerBound = calibratedPressure - 10.0f;
+
+    if (realtimePressure >= lowerBound && realtimePressure <= upperBound) {
+        m_stableTickCount++;
+    } else {
+        m_stableTickCount = 0;
+    }
+
+    return m_stableTickCount >= REQUIRED_STABLE_TICKS;
+}
+
+void PressureMonitor::reset()
+{
+    m_stableTickCount = 0;
+}
+
+bool PressureMonitor::isCurrentlyInRange() const
+{
+    return m_stableTickCount > 0;
+}
+
+int PressureMonitor::stableTickCount() const
+{
+    return m_stableTickCount;
+}
\ No newline at end of file
diff --git a/PressureMonitor.h b/PressureMonitor.h
new file mode 100644
index 0000000..578808b
--- /dev/null
+++ b/PressureMonitor.h
@@ -0,0 +1,29 @@
+#ifndef PRESSUREMONITOR_H
+#define PRESSUREMONITOR_H
+
+class PressureMonitor
+{
+public:
+    PressureMonitor();
+
+    // 每个100ms tick 调用一次
+    // realtimePressure: 实时压力 (sysPara->status.PRESSURE)
+    // calibratedPressure: 标定压力 (sysPara->para.pressure)
+    // 返回 true 表示压力已持续稳定 3 秒
+    bool tick(float realtimePressure, float calibratedPressure);
+
+    // 重置监测器状态
+    void reset();
+
+    // 当前压力是否在 ±10% 范围内
+    bool isCurrentlyInRange() const;
+
+    // 当前连续稳定的 tick 计数
+    int stableTickCount() const;
+
+private:
+    int m_stableTickCount;
+    static const int REQUIRED_STABLE_TICKS = 30; // 3秒 / 100ms = 30 ticks
+};
+
+#endif // PRESSUREMONITOR_H
\ No newline at end of file
diff --git a/QtUI.pro b/QtUI.pro
index b19b2e5..5e5d599 100644
--- a/QtUI.pro
+++ b/QtUI.pro
@@ -96,6 +96,7 @@ HEADERS +=  Public.h \
 #    ParaSettingUI.h \
     DevOp.h \
     posix_qextserialport.h \
+    PressureMonitor.h \
     rfid/sm4.h \
     rfid/sm3.h \
     rfid/rfidfunction.h \
@@ -254,6 +255,7 @@ SOURCES +=\
 #    ParaSettingUI.cpp \
     DevOp.cpp \
     posix_qextserialport.cpp \
+    PressureMonitor.cpp \
     rfid/sm4.cpp \
     rfid/sm3.cpp \
     rfid/rfidfunction.cpp \
@@ -395,4 +397,4 @@ if(contains(DEFINES,__2451WIFI__))
     #SOURCES += /home/student/newDisk/2451_linux/wpa_supplicant_hostapd/wpa_supplicant_hostapd-0.8/src/common/wpa_ctrl.c
     #INCLUDEPATH += /home/student/newDisk/2451_linux/wpa_supplicant_hostapd/wpa_supplicant_hostapd-0.8/src
     #INCLUDEPATH += /home/student/newDisk/2451_linux/wpa_supplicant_hostapd/wpa_supplicant_hostapd-0.8/src/utils
-}
+}
\ No newline at end of file
diff --git a/mainwidget.cpp b/mainwidget.cpp
index 06881c8..42bf960 100644
--- a/mainwidget.cpp
+++ b/mainwidget.cpp
@@ -129,6 +129,8 @@ void MainWidget::init()
     airPushTimer = new QTimer(this);
     connect(airPushTimer, SIGNAL(timeout()), this, SLOT(airPushingProcess()));
 
+    m_pressureMonitor = new PressureMonitor();
+
     timerPowerOff = new QTimer(this);
     connect(timerPowerOff,SIGNAL(timeout()),this,SLOT(sendPowerOffCmd()));
 
@@ -1221,18 +1223,6 @@ void MainWidget::airPushingProcess()
                 sysPara->saveParaToFile();
             }
 
-            // 延迟 半秒后才开回收槽，正式结束排气阶段
-            if(sysPara->status.airPushingOnTime >= sysPara->para.airPushDurationSec * 1000 + 500){
-                //qDebug()<< "start stop";
-                reclaimTanOpen();
-                sysPara->status.airPushingDone = 1;
-                sysPara->status.airPushing = 0;
-                sysPara->status.airPushingOnTime = 0;
-                airPushTimer->stop();
-                setRunStatus(tr("喷嘴开启中"));
-                return;
-            }
-
             if(sysPara->status.airPushingOnTime >= sysPara->para.airPushDurationSec * 1000){
                 sysPara->devOp->controlViscosityPump(false);
                 sysPara->devOp->controlCycleValve(false);
@@ -1240,6 +1230,21 @@ void MainWidget::airPushingProcess()
                 if(!sysPara->devOp->isReclaimPumpOpen())
                     sysPara->devOp->controlReclaimPump(true, false);
 
+                // 切换回自动模式
+                sysPara->status.isPumpValveControledByHand = false;
+
+                setRunStatus(tr("等待压力稳定..."));
+
+                // 调用压力检测器，监测压力持续3秒波动范围不超过标定值的+-10%
+                if(m_pressureMonitor->tick((float)sysPara->status.PRESSURE, (float)sysPara->para.pressure)) {
+                    reclaimTanOpen();
+                    sysPara->status.airPushingDone = 1;
+                    sysPara->status.airPushing = 0;
+                    sysPara->status.airPushingOnTime = 0;
+                    airPushTimer->stop();
+                    m_pressureMonitor->reset();
+                    setRunStatus(tr("喷嘴开启中"));
+                }
                 return;
             }
         }
@@ -1431,6 +1436,7 @@ void MainWidget::on_m_RightBtn_clicked()
                     sysPara->status.airPushingOnTime = 0;
 
                     airPushTimer->start(100); // 100ms
+                    m_pressureMonitor->reset();
                 }
             }
             else {
@@ -2698,4 +2704,4 @@ void MainWidget::UpdateUIVersion(){
     QString Mac = QString::number(sysPara->status.machineMac);
     LogInfo::setRunStatusText(QString("Mac:%1").arg(Mac));
     LogInfo::showVerionInformation(Mac,VernonBach,fpgaVersion,STM32Ver);
-}
+}
\ No newline at end of file
diff --git a/mainwidget.h b/mainwidget.h
index 449549c..fcd5b62 100644
--- a/mainwidget.h
+++ b/mainwidget.h
@@ -30,6 +30,7 @@
 
 #include "setnumdlg.h"
 #include "PrintSetting.h"
+#include "PressureMonitor.h"
 
 class MainWidget : public QWidget
 {
@@ -165,6 +166,8 @@ private:
     int r_ExpiryDay;
     QTimer *airPushTimer;
 
+    PressureMonitor *m_pressureMonitor = nullptr;
+
     PicScene *pPicScene = nullptr;
     QGraphicsView *view;
     PrintSettingModel printSettingsModel;