diff --git a/tools/SignTool/SignImage b/tools/SignTool/SignImage
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diff --git a/tools/SignTool/SignImage.exe b/tools/SignTool/SignImage.exe
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diff --git a/tools/SignTool/key/RSA_1024/private.k b/tools/SignTool/key/RSA_1024/private.k
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diff --git a/tools/SignTool/key/RSA_1024/public.k b/tools/SignTool/key/RSA_1024/public.k
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diff --git a/tools/SignTool/key/RSA_2048/private.k b/tools/SignTool/key/RSA_2048/private.k
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diff --git a/tools/SignTool/key/RSA_2048/public.k b/tools/SignTool/key/RSA_2048/public.k
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diff --git a/tools/SignTool/libcrypto-1_1-x64.dll b/tools/SignTool/libcrypto-1_1-x64.dll
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diff --git a/tools/SignTool/readme.txt b/tools/SignTool/readme.txt
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@@ -0,0 +1,28 @@
+1、SignImage为签名命令
+
+./SignImage [option]
+	 -h help
+	 -i input file  输入文件
+	 -o output file 输出文件
+	 -k private key 私钥文件
+	 -t hash type, [md5 sha256],default sha256 散列算法
+	 -d detached mode，Signature files are saved independently 离散模式
+	 -e print public key hash value 打印public key hash值
+	 -r resign again 重新签名
+	 -l legacy mode  旧签名头模式
+	 -v debug mode   debug模式
+	 -z sign for zloader zloader签名
+
+
+2、 密钥生成
+key目录为签名密钥
+
+3、 zloader签名
+SignImage -z -i zloader.bin -o out/zloader.bin -k key/RSA_1024/private.k
+
+4、其他镜像签名
+SignImage  -i linux_kernel.bin -o out/ap_cpuap.bin -k key/RSA_1024/private.k  -t md5
+SignImage  -i linux_kernel.bin -o out/ap_cpuap.bin -k key/RSA_2048/private.k
+
+5、pubkey的hash值
+./SignImage  -e -k key/RSA_2048/private.k