Abstract: In order to analyze the biomass power generation cost, several main ways of biomass power generation, such as biomass direct combustion, co-combustion and biomass gasification combined cycle, were discussed. The fuel consumption mass flow calculation models and fuel cost models were established. Based on the same power generation capacity (15 MW), annual fuel consumption mass flow, biomass purchase price, transportation price and fuel cost were calculated. The results show that power generation efficiency has greater influence on fuel cost and biomass direct power generation fuel cost is 2 times of the others.