Abstract: System is designed to have three different grades on three-layer distributed application by combining PowerBuilder and Adaptive Server Anywhere.By the Separation between  User interface and business logic conquers,some problems such as the lack of safety control,security and the overloading on client side have been conquered,and  it realizes coding management and the design research of drawing read over marginalia in PDM.

Key words: Coding Management, drawing read over marginalia, design