Having 7.7*108 t/a of crops straw, 3.97*109 t/a of poultry and livestock manure, 1.48*108 t/a of municipal waste, China is in possession of good resource condition for the development of bioenergy industries. But the competitiveness of bioenergy industry is low. In order to improving the competitiveness of biomass energy industry, combining with system dynamics, according to the comprehensive evaluation index system, this thesis used the entropy coefficient and introduced TOPSIS method into the comprehensive evaluation of the biomass energy industry competitiveness. It has resolved the problem of artificial weighted evaluation that commonly used in weighted comprehensive evaluation. The results show that this method is practicable.