In order to solve the problems such as lack of dynamic evaluation system in evaluation of quality and safety trust of dairy products, and weak awareness of prevention, it is necessary to introduce the statistical process control into the quality and safety trust evaluation system of dairy products, and establish quality and safety trust early warning model for dairy products, so as to determine the control limit of control chart and carry out early warning according to eight criteria. According to the empirical results indicate, the statistical process control is helpful for finding the hidden process risks and providing the necessary basis for enterprises taking positive measures to raise the confidence of consumers.