diff --git a/db/create_users.sql b/db/create_users.sql
new file mode 100644
index 0000000..56ba6ff
--- /dev/null
+++ b/db/create_users.sql
@@ -0,0 +1,21 @@
+-- 创建系统用户表
+CREATE TABLE IF NOT EXISTS `sys_users` (
+  `id` INT NOT NULL AUTO_INCREMENT COMMENT '用户ID',
+  `username` VARCHAR(50) NOT NULL COMMENT '用户名',
+  `password_hash` VARCHAR(255) NOT NULL COMMENT '密码哈希值',
+  `salt` VARCHAR(32) NOT NULL COMMENT '盐值',
+  `user_role` TINYINT NOT NULL DEFAULT 0 COMMENT '用户角色：0=普通用户，1=管理员',
+  `status` TINYINT NOT NULL DEFAULT 1 COMMENT '状态：0=禁用，1=启用',
+  `create_time` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+  `update_time` DATETIME DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
+  `last_login_time` DATETIME DEFAULT NULL COMMENT '最后登录时间',
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `uk_username` (`username`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='系统用户表';
+
+-- 插入默认管理员账户
+-- 用户名: admin
+-- 密码: admin123
+INSERT INTO `sys_users` (`username`, `password_hash`, `salt`, `user_role`, `status`, `create_time`)
+VALUES
+('admin', 'n5Z+2zK4E0X6tQhV8K7L9n3P2Z5T6s8=', 'Vb6D9gF3H5jK8mN0pQ2R5tU8wX1z=', 1, 1, NOW());
diff --git a/全自动水压检测仪/全自动水压检测仪.csproj b/全自动水压检测仪/全自动水压检测仪.csproj
index 14821a9..34b7356 100644
--- a/全自动水压检测仪/全自动水压检测仪.csproj
+++ b/全自动水压检测仪/全自动水压检测仪.csproj
@@ -65,16 +65,16 @@
     <Reference Include="MySql.Data, Version=9.5.0.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d, processorArchitecture=MSIL">
       <HintPath>..\packages\MySql.Data.9.5.0\lib\net462\MySql.Data.dll</HintPath>
     </Reference>
-    <Reference Include="NModbus4">
+    <Reference Include="NModbus4, Version=2.1.0.0, Culture=neutral, processorArchitecture=MSIL">
       <HintPath>..\packages\NModbus4.2.1.0\lib\net40\NModbus4.dll</HintPath>
     </Reference>
     <Reference Include="PresentationCore" />
     <Reference Include="PresentationFramework" />
-    <Reference Include="SunnyUI">
-      <HintPath>..\packages\SunnyUI.3.8.9\lib\net472\SunnyUI.dll</HintPath>
+    <Reference Include="SunnyUI, Version=3.9.1.0, Culture=neutral, PublicKeyToken=3f4ebed4237db5e1, processorArchitecture=MSIL">
+      <HintPath>..\packages\SunnyUI.3.9.1\lib\net472\SunnyUI.dll</HintPath>
     </Reference>
-    <Reference Include="SunnyUI.Common">
-      <HintPath>..\packages\SunnyUI.Common.3.8.9\lib\net472\SunnyUI.Common.dll</HintPath>
+    <Reference Include="SunnyUI.Common, Version=3.9.1.0, Culture=neutral, PublicKeyToken=3f4ebed4237db5e1, processorArchitecture=MSIL">
+      <HintPath>..\packages\SunnyUI.Common.3.9.1\lib\net472\SunnyUI.Common.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Buffers, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
@@ -85,6 +85,7 @@
       <HintPath>..\packages\System.Configuration.ConfigurationManager.8.0.0\lib\net462\System.Configuration.ConfigurationManager.dll</HintPath>
     </Reference>
     <Reference Include="System.Core" />
+    <Reference Include="System.Design" />
     <Reference Include="System.IO.Pipelines, Version=5.0.0.2, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
       <HintPath>..\packages\System.IO.Pipelines.5.0.2\lib\net461\System.IO.Pipelines.dll</HintPath>
     </Reference>
@@ -104,6 +105,7 @@
       <HintPath>..\packages\System.Threading.Tasks.Extensions.4.5.4\lib\net461\System.Threading.Tasks.Extensions.dll</HintPath>
     </Reference>
     <Reference Include="System.Transactions" />
+    <Reference Include="System.Web.Extensions" />
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />
@@ -128,13 +130,18 @@
     <Compile Include="CommonDefs.cs" />
     <Compile Include="DATA\BoolSign.cs" />
     <Compile Include="DATA\ConductividyClass.cs" />
+    <Compile Include="DATA\DatabaseInitializer.cs" />
     <Compile Include="DATA\DataChange.cs" />
     <Compile Include="DATA\FormManager.cs" />
     <Compile Include="DATA\Function.cs" />
     <Compile Include="DATA\keyboard.cs" />
     <Compile Include="DATA\LoginData.cs" />
+    <Compile Include="DATA\LoginDebugHelper.cs" />
     <Compile Include="DATA\ModbusResourceManager.cs" />
     <Compile Include="DATA\PLC_Data.cs" />
+    <Compile Include="DATA\PasswordHelper.cs" />
+    <Compile Include="DATA\User.cs" />
+    <Compile Include="DATA\UserRepository.cs" />
     <Compile Include="ScanImport.cs">
       <SubType>Form</SubType>
     </Compile>
@@ -148,6 +155,30 @@
       <DependentUpon>NormalTemperatureMode.cs</DependentUpon>
     </Compile>
     <Compile Include="Program.cs" />
+    <Compile Include="Forms\ChangePasswordForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="Forms\ChangePasswordForm.Designer.cs">
+      <DependentUpon>ChangePasswordForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Forms\LoginForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="Forms\LoginForm.Designer.cs">
+      <DependentUpon>LoginForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Forms\UserEditForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="Forms\UserEditForm.Designer.cs">
+      <DependentUpon>UserEditForm.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Forms\UserManagerForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="Forms\UserManagerForm.Designer.cs">
+      <DependentUpon>UserManagerForm.cs</DependentUpon>
+    </Compile>
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Report.cs">
       <SubType>Form</SubType>
@@ -158,6 +189,9 @@
     <EmbeddedResource Include="Coeffiicientsetting.resx">
       <DependentUpon>Coeffiicientsetting.cs</DependentUpon>
     </EmbeddedResource>
+    <EmbeddedResource Include="Forms\LoginForm.resx">
+      <DependentUpon>LoginForm.cs</DependentUpon>
+    </EmbeddedResource>
     <EmbeddedResource Include="ScanImport.resx">
       <DependentUpon>ScanImport.cs</DependentUpon>
     </EmbeddedResource>