diff --git a/tool/convert_mnn.js b/tool/convert_mnn.js
new file mode 100644
index 0000000..3fe3584
--- /dev/null
+++ b/tool/convert_mnn.js
@@ -0,0 +1,36 @@
+const fs = require("fs");
+const path = require("path");
+const { spawnSync } = require("child_process");
+
+const CONVERTER_PATH = "C:/Develop/Libs/mnn/bin/MNNConvert.exe";
+const MODEL_PATH = path.join(__dirname, "../models");
+
+function onnx2mnn(model) {
+	const name = path.basename(model, ".onnx");
+	const outputFile = path.join(path.dirname(model), name + ".mnn");
+	if (fs.existsSync(outputFile)) console.log(`Skip ${name}`);
+	else {
+		const result = spawnSync(CONVERTER_PATH, [
+			"-f", "ONNX",
+			"--modelFile", model,
+			"--MNNModel", outputFile,
+			"--bizCode", "biz"
+		]);
+		if (result.status !== 0) {
+			console.error(`Failed to convert ${name}`);
+			console.log(result.stdout.toString());
+		}
+		else console.log(`Convert ${name} success`);
+	}
+}
+
+function resolveDir(dir) {
+	const files = fs.readdirSync(dir);
+	for (const file of files) {
+		const filepath = path.join(dir, file);
+		if (fs.statSync(filepath).isDirectory()) resolveDir(filepath);
+		else if (path.extname(file) == ".onnx") onnx2mnn(filepath);
+	}
+}
+
+resolveDir(MODEL_PATH)
\ No newline at end of file