The plant-fiber and starch have widly applications in the dishware materials, which can be taken place of the plastic packaging materials, the plant-fiber and starch dishware can eliminate the white pollution problem effectively for the environment. The mold for the plant-fiber and starch dishware is important for its manufacturing. In this paper, the finite element thermal analysis model of the plant-fiber and starch dishware mould is developed by using the Pro/E, then temperature profile of the mould was analyzed by using ANSYS based on the thermal analysis theory. At last, the structural parameters are optimized based on iterative method. The present analysis provid the theoretical basis for the applications of the mould for the plant-fiber and starch materials.