diff --git a/SpineViewer/MainForm.cs b/SpineViewer/MainForm.cs
index 525e81f..3453916 100644
--- a/SpineViewer/MainForm.cs
+++ b/SpineViewer/MainForm.cs
@@ -43,7 +43,64 @@ namespace SpineViewer
 
         private void ExportPng_Work(object? sender, DoWorkEventArgs e)
         {
+            var worker = sender as BackgroundWorker;
+            var arguments = e.Argument as Dialogs.ExportPngDialog;
+            var outputDir = arguments.OutputDir;
+            var duration = arguments.Duration;
+            var fps = arguments.Fps;
+            var timestamp = DateTime.Now.ToString("yyMMddHHmmss");
 
+            var resolution = spinePreviewer.Resolution;
+            var tex = new SFML.Graphics.RenderTexture((uint)resolution.Width, (uint)resolution.Height);
+            tex.SetView(spinePreviewer.View);
+            var delta = 1f / fps;
+            var frameCount = 1 + (int)(duration / delta); // 零帧开始导出
+
+            spinePreviewer.StopPreview();
+
+            lock (spineListView.Spines)
+            {
+                var spinesReverse = spineListView.Spines.Reverse();
+
+                // 重置动画时间
+                foreach (var spine in spinesReverse)
+                    spine.CurrentAnimation = spine.CurrentAnimation;
+
+                Program.Logger.Info(
+                    "Begin exporting png frames to output dir {}, duration: {}, fps: {}, totally {} spines", 
+                    [outputDir, duration, fps, spinesReverse.Count()]
+                );
+
+                // 逐帧导出
+                var success = 0;
+                worker.ReportProgress(0, $"已处理 0/{frameCount}");
+                for (int frameIndex = 0; frameIndex < frameCount; frameIndex++)
+                {
+                    if (worker.CancellationPending)
+                        break;
+
+                    tex.Clear(SFML.Graphics.Color.Transparent);
+
+                    foreach(var spine in spinesReverse)
+                    {
+                        tex.Draw(spine);
+                        spine.Update(delta);
+                    }
+
+                    tex.Display();
+                    using (var img = tex.Texture.CopyToImage())
+                    {
+                        img.SaveToFile(Path.Combine(outputDir, $"{timestamp}_{fps}_{frameIndex:d6}.png")); 
+                    }
+
+                    success++;
+                    worker.ReportProgress((int)((frameIndex + 1) * 100.0) / frameCount, $"已处理 {frameIndex + 1}/{frameCount}");
+                }
+
+                Program.Logger.Info("Exporting done: {}/{}", success, frameCount);
+            }
+
+            spinePreviewer.StartPreview();
         }
 
         private void MainForm_Load(object sender, EventArgs e)
@@ -77,14 +134,14 @@ namespace SpineViewer
                 }
             }
 
-            //var openDialog = new BatchOpenSpineDialog();
-            //if (openDialog.ShowDialog() != DialogResult.OK)
-            //    return;
+            var exportDialog = new Dialogs.ExportPngDialog();
+            if (exportDialog.ShowDialog() != DialogResult.OK)
+                return;
 
-            //var progressDialog = new ProgressDialog();
-            //progressDialog.DoWork += ExportPng_Work;
-            //progressDialog.RunWorkerAsync(new { openDialog.SkelPaths, openDialog.Version });
-            //progressDialog.ShowDialog();
+            var progressDialog = new Dialogs.ProgressDialog();
+            progressDialog.DoWork += ExportPng_Work;
+            progressDialog.RunWorkerAsync(exportDialog);
+            progressDialog.ShowDialog();
         }
 
         private void toolStripMenuItem_Exit_Click(object sender, EventArgs e)