diff --git a/Src/nmNum/nmSubWnd/nmSubWndMain.cpp b/Src/nmNum/nmSubWnd/nmSubWndMain.cpp
index 68ff9da..9ba9215 100644
--- a/Src/nmNum/nmSubWnd/nmSubWndMain.cpp
+++ b/Src/nmNum/nmSubWnd/nmSubWndMain.cpp
@@ -2403,9 +2403,13 @@ void nmSubWndMain::onGenerateButtonClicked()
     //QString sDir = ZxBaseUtil::getCurWellDirOf("Nm/PreProcessing");
 
     if(nmDataAnalyzeManager::getCurrentInstance()->getGridType() == NM_Grid_PEBI) {
-        // 生成PEBI网格
         nmCalculationPebiGrid* pPebiGridGeneratorInstance = nmCalculationPebiGrid::getInstance();
-        pPebiGridGeneratorInstance->meshGenPebi();
+        if(pPebiGridGeneratorInstance->getGridOutput2().Trinodexy.size() <= 0) {
+            // 没有可用PEBI网格时才重新生成
+            if(!pPebiGridGeneratorInstance->meshGenPebi()) {
+                return;
+            }
+        }
 
         // 求解计算
         this->solveAndAnalyze();