diff --git a/dm.py b/dm.py
index 8a80a59..fde271e 100644
--- a/dm.py
+++ b/dm.py
@@ -1,18 +1,33 @@
+import socket
 import sys
 
+import pymysql
 from PySide6 import QtWidgets
 from PySide6.QtWidgets import QApplication, QMainWindow, QTableWidget, QTableWidgetItem, QVBoxLayout, QWidget, \
-    QTextEdit
+    QTextEdit, QPushButton, QHBoxLayout, QLineEdit, QMessageBox
 
 
 class TableWidgetExample(QMainWindow):
     def __init__(self):
         super().__init__()
 
+        self.connection = None
+        self.cursor = None
+        self.is_connect = False
+
+        # self.button_add = None
+        # self.button_execute = None
+        # self.input_text = None
+
+        # self.connection_host = None
+        # self.connection_port = None
+        # self.connection_user = None
+        # self.connection_pwd = None
+
         self.initUI()
 
     def initUI(self):
-        self.setWindowTitle("弹幕采集")
+        self.setWindowTitle("采集")
         self.setGeometry(100, 100, 800, 600)
 
         central_widget = QWidget()
@@ -61,14 +76,103 @@ class TableWidgetExample(QMainWindow):
         bottom_widget = QWidget()
         bottom_widget.setFixedHeight(200)
         bottom_layout = QVBoxLayout(bottom_widget)
-        input_text = QTextEdit()
-        bottom_layout.addWidget(input_text)
+        self.input_text = QTextEdit()
+        self.input_text.setPlaceholderText("请输入链接，一行一个")
+        bottom_layout.addWidget(self.input_text)
+
+        connection_layout = QHBoxLayout()
+        self.connection_host = QLineEdit()
+        self.connection_host.setPlaceholderText("地址")
+
+        self.connection_port = QLineEdit()
+        self.connection_port.setPlaceholderText("端口")
+
+        self.connection_dbname = QLineEdit()
+        self.connection_dbname.setPlaceholderText("数据库")
+
+        self.connection_user = QLineEdit()
+        self.connection_user.setPlaceholderText("用户名")
+
+        self.connection_pwd = QLineEdit()
+        self.connection_pwd.setPlaceholderText("密码")
+        self.connection_pwd.setEchoMode(QLineEdit.Password)
+
+        self.button_connection = QPushButton("连接")
+        self.button_connection.clicked.connect(self.connect_to_database)
+
+        connection_layout.addWidget(self.connection_host)
+        connection_layout.addWidget(self.connection_port)
+        connection_layout.addWidget(self.connection_user)
+        connection_layout.addWidget(self.connection_pwd)
+        connection_layout.addWidget(self.button_connection)
+        bottom_layout.addLayout(connection_layout)
+
+        action_layout = QHBoxLayout()
+        button_add = QPushButton("添加链接")
+        action_layout.addWidget(button_add)
+        button_execute = QPushButton("开始采集")
+        action_layout.addWidget(button_execute)
+        bottom_layout.addLayout(action_layout)
+
         center_layout.addWidget(bottom_widget)
 
-        # 按钮部分
+    def connect_to_database(self):
+        # 数据库基本信息
+        host = self.connection_host.text()
+        port = self.connection_port.text()
+        user = self.connection_user.text()
+        pwd = self.connection_pwd.text()
+        dbname = self.connection_dbname.text()
+
+        if not host or not port or not user or not pwd:
+            self.statusBar().showMessage("主机、端口、用户名和密码不能为空!")
+            QMessageBox.critical(self, "Error", "主机、端口、用户名和密码不能为空!")
+            return
+
+        try:
+            socket.gethostbyname(host)
+        except socket.error:
+            self.statusBar().showMessage("无效的主机!")
+            QMessageBox.critical(self, "Error", "无效的主机!")
+            return
+        else:
+            # 主机有效
+            print("有效的主机")
+
+        # 校验端口
+        try:
+            port = int(port)
+            if 0 < port <= 65535:
+                print("有效的端口")
+            else:
+                QMessageBox.critical(self, "Error", "端口超出范围!")
+                self.statusBar().showMessage("端口超出范围!")
+                return
+        except ValueError:
+            QMessageBox.critical(self, "Error", "无效的端口!")
+            self.statusBar().showMessage("无效的端口!")
+            return
+        try:
+            # 连接数据库
+            self.connection = pymysql.connect(host=host, port=port, user=user, password=pwd, db=dbname)
+            self.cursor = self.connection.cursor()
+            # 链接成功
+            self.is_connect = True
 
 
 
+            self.statusBar().showMessage("Connection succees!")
+        except pymysql.Error as e:
+            # 异常 连接失败
+            self.is_connect = False
+            QMessageBox.critical(self, "Error", str(e))
+            self.statusBar().showMessage("Connection failed")
+
+    def closeEvent(self, event):
+        if self.connection:
+            self.connection.close()
+        event.accept()
+
 
 if __name__ == "__main__":
     app = QApplication(sys.argv)
diff --git a/main.py b/main.py
index af0934a..734953f 100644
--- a/main.py
+++ b/main.py
@@ -116,7 +116,7 @@ class SQLClient(QMainWindow):
         splitter_handle.addWidget(bottom_widget)
         central_widget.addWidget(splitter_handle)
 
-        self.db_type_input = QComboBox()
+        db_type_input = QComboBox()
         self.db_type_input.addItems(["sqlite", "mysql", "pgsql"])
         self.db_type_input.setPlaceholderText("Database Type")
         connection_layout.addWidget(self.db_type_input)