In view of the uncertainty in the evaluation of the design of food filling machine, a new evaluation method for the design of food filling machine was proposed. Firstly, the evaluation index system of the design scheme of the food filling machine was set up, and the grade of the design scheme evaluation and the interval number of the food filling machine were put forward. Moreover, the interval number weight of the evaluation index of the design scheme of the food filling machine was determined by the interval analytic hierarchy process. Furthermore, an evaluation model of food filling machine design scheme based on interval analytic hierarchy process and membership degree was constructed. Finally, an evaluation example was used to evaluate the design scheme of a multi-purpose chili filling automatic filling equipment, which verifies the rationality and validity of the evaluation model.