The cell integration of welding plant in automobile manufacturing enterprises is discussed. Considering the enterprise’s schedule of CIMS and characteristics of welding industry, the functions and requirements of the integral platform are put forward. The structural frame and system constitution of the welding cell integration are described in detail. The solution of the integration of heterogeneous data and heterogeneous network in the integration process is given. Some suggestions and requirements in the implementation of the cell integration in welding plant are put forward.