diff --git a/OAT.xml b/OAT.xml
index 17c700accc65a0f1a024472ac62923e3cb91602b..a492029386435e9e807e3cdcfd932d2e19d23abe 100644
--- a/OAT.xml
+++ b/OAT.xml
@@ -51,6 +51,7 @@
+
diff --git a/doc/Instructions.md b/doc/Instructions.md
index 9ad3abb55d706eadb2a002fedf67512eaa772f1e..2c067cf594620cdb51441f010dfd05998c8605e8 100644
--- a/doc/Instructions.md
+++ b/doc/Instructions.md
@@ -86,8 +86,28 @@ this.title = this.$r('app.string.hello_world');
## 签名打包
### 签名
#### 签名文件的获取
-1. 拷贝OpenHarmony标准版 工程的 prebuilts\signcenter 目录到操作目录
-2. 拷贝SystemUI 工程的 signature\systemui.p7b 到该目录下
+1. 方式一:拷贝OpenHarmony标准版工程的 **prebuilts/signcenter/key/OpenHarmony.p12** 文件到SystemUI 工程的 signature目录
+2. 方式二:拷贝OpenHarmony SDK目录下的 **Sdk/toolchains/lib/OpenHarmony.p12** 文件到SystemUI 工程的 signature目录
+3. OpenHarmony.p12 文件信息
+ - OpenHarmony.p12 文件的Alias别名为:`Openharmony Application Release`
+ - OpenHarmony.p12 文件的Password密码为:`123456`
+
+#### 证书文件的生成
+
+1. 添加keytool命令到系统环境变量
+ - keytool(keytool.exe)命令在DevEco Studio安装目录的**jbr\bin**文件夹下。
+ - 复制DevEco Studio安装目录的**jbr\bin**文件夹的绝对路径,添加到Path系统环境变量中;
+
+2. 执行 `pfile2cer.bat` 脚本生成证书文件
+ - 在DevEco Studio的Terminal终端中执行pfile2cer.bat脚本
+ - 提示输入密钥库口令时,输入 `123456` 即可
+
+ 
+
+ - 在SystemUI工程的 signature 目录下,将会自动生成 `OpenHarmonyApplication.cer` 和 `OpenHarmonyApplication.csr` 两个证书文件。
+
+ 
+
#### 签名文件的配置
打开项目工程,选择 File → Project Structure
diff --git a/figures/signature_cer_1.png b/figures/signature_cer_1.png
new file mode 100644
index 0000000000000000000000000000000000000000..86f01d5de8eaa61d2d3ffc52473e9b774d79527e
Binary files /dev/null and b/figures/signature_cer_1.png differ
diff --git a/figures/signature_cer_2.png b/figures/signature_cer_2.png
new file mode 100644
index 0000000000000000000000000000000000000000..3cf8a68389ef52d0e067e157c56adde1bd8e26f2
Binary files /dev/null and b/figures/signature_cer_2.png differ
diff --git a/pfile2cer.bat b/pfile2cer.bat
new file mode 100644
index 0000000000000000000000000000000000000000..8fccaa005040addd362602d048bfd1bc32945414
--- /dev/null
+++ b/pfile2cer.bat
@@ -0,0 +1,22 @@
+@rem
+@rem Copyright (c) 2021 Talkweb Co., Ltd.
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem http://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@echo off
+echo %~dp0
+set signature_path=%~dp0/signature/
+
+keytool -certreq -alias "OpenHarmony Application Release" -keystore %signature_path%/OpenHarmony.p12 -storetype pkcs12 -file %signature_path%/OpenHarmonyApplication.csr
+
+keytool -gencert -alias "OpenHarmony Application CA" -infile %signature_path%/OpenHarmonyApplication.csr -outfile %signature_path%/OpenHarmonyApplication.cer -keystore %signature_path%/OpenHarmony.p12 -sigalg SHA384withECDSA -storepass 123456 -ext KeyUsage:"critical=digitalSignature" -validity 3650 -rfc