Abstract: The studied outer door is a plastic production with thin for the outer decoration of the certain type DVD disc recorder. And there are the higher requirements of assemble, appearance and so on. According to the warpage of part in the practical production, combining with orthogonal experiment method and CAE technology, the process parameters are optimized and the optimal combinations of process parameters are achieved by the integrated balance method. Especially, under this process, the qualified product can be obtained through the experimental verification. The research may provide a theoretical basis and technical support to the practical mass production.