diff --git a/Bin/Config/Lang/cn/nmNum_cn.qm b/Bin/Config/Lang/cn/nmNum_cn.qm
index c3daf824..4c6dfbfc 100644
Binary files a/Bin/Config/Lang/cn/nmNum_cn.qm and b/Bin/Config/Lang/cn/nmNum_cn.qm differ
diff --git a/Bin/Config/Lang/cn/nmNum_cn.ts b/Bin/Config/Lang/cn/nmNum_cn.ts
index 37b1bbbf..ad1f6241 100644
--- a/Bin/Config/Lang/cn/nmNum_cn.ts
+++ b/Bin/Config/Lang/cn/nmNum_cn.ts
@@ -5262,6 +5262,14 @@ Please check your input coordinates.</source>
 </context>
 <context>
     <name>nmWxGridDlg</name>
+    <message>
+        <source>Input Error</source>
+        <translation>输入错误</translation>
+    </message>
+    <message>
+        <source>Grid size must be a finite number greater than zero.</source>
+        <translation>网格大小必须是大于零的有限数值。</translation>
+    </message>
     <message>
         <source>GridType</source>
         <translation>网格类型：</translation>
diff --git a/Src/nmNum/nmSubWxs/nmWxGridDlg.cpp b/Src/nmNum/nmSubWxs/nmWxGridDlg.cpp
index b0363390..05c58cb7 100644
--- a/Src/nmNum/nmSubWxs/nmWxGridDlg.cpp
+++ b/Src/nmNum/nmSubWxs/nmWxGridDlg.cpp
@@ -5,8 +5,10 @@
 #include <QHBoxLayout>
 #include <QLabel>
 #include <QLineEdit>
+#include <QMessageBox>
 #include <QPushButton>
 #include <QVBoxLayout>
+#include <qnumeric.h>
 
 nmWxGridDlg::nmWxGridDlg(double *pPebiGridControl):
     m_pPebiGridControl(pPebiGridControl),
@@ -20,6 +22,13 @@ nmWxGridDlg::nmWxGridDlg(double *pPebiGridControl):
 
 void nmWxGridDlg::on_save()
 {
+    // 无效文本转换为零；保存前统一拦截非正数和非有限值，保留原有网格设置。
+    if (!qIsFinite(m_dPebiGridControlTmp) || m_dPebiGridControlTmp <= 0.0) {
+        QMessageBox::warning(this, tr("Input Error"),
+                             tr("Grid size must be a finite number greater than zero."));
+        return;
+    }
+
     // 保存PEBI GridControl, GridType固定为PEBI, 仅在界面展示.
     if (m_pPebiGridControl != NULL) {
         *m_pPebiGridControl = m_dPebiGridControlTmp;