Through the introduction of existing classification of molded pulp materials, a new kind of molded pulp packaging materials was defined, whose name was modeling fiber molded packaging material. And the index system of the mechanical properties was constructed. The characteristic requirements and the main purpose of the material to be met were analyzed, and the index system of modeling molded packaging materials was discussed. Due to lack of molded pulp packaging unified test method at home and abroad, it referred to the performance test standards of paper materials, cushioning packaging materials and overall packaging materials. It concluded the performance index of modeling molded packaging materials from the strength, stiffness, elasticity, plasticity and flexibility, in order to establish the mechanical performance index system containing 5 secondary indexes and 14 tertiary indexes. It provided the basis for the structure design of the molded packaging products in the future, and also provided certain reference value for the molded packaging materials which lack unified test method and performance evaluation standard at home and abroad.