Abstract: Using C/S structure the CAPP system of rich Argon protected welding based on Visual Basic 6.0 Integrated Develop Environment(IDE) was developed.Some key techniques used in the system are discussed,including the VBA,the OLE Automation technique in the client,and the SQL Server 2000 in the server.The information management of weld joint based on character,the maintenance and edition of process experiment report,the information management of process card,intelligence produce and output of process card are included.