Abstract: Biomass materials are the best substitute for those made of plastic packaging materials in the world, widespread application of these materials can control or eliminate the increase of white pollution problem effectively in the world. In this paper, the mechanical properties of three kinds of plant fiber and starch dishware were presented by tensile tests, which included Elastic Modulus, Poisson’s Ratio and Tensile Strength. Finite element models of the biodegradable dishware were established by using the experimental result of the mechanical properties. The rule of the stress and strain distribution of the plant fiber and starch dishware under outside load was found with finite element method, which was verified by the experimental result, and the force-deformation curve of plant fiber and starch dishware was found. The results is of significance to its design, transport and application.