Abstract: The warehouse and collection station scale and inventory level are essential to reduce fix cost and operational costs for the biomass direct combustion power plant. In order to settle the problems, a dynamic programming model is established by joining the warehouse scale, station scale, and their inventory control. In the case of the 30MW biomass power plant, according to the model and sensitivity analysis of the relative parameters, some conclusions are reached, such as：using multibiomass fuel, the warehouse scale and collection station scale are respectively 35 887 and 24 147m2；when safety inventory levels of them both are respectively under 6 000 ton and 17 000 ton, the total cost will reduce, or else it will increase. Similar results emerge when using single biomass.

Key words:  biomass direct combustion generation power, warehouse, collection station, storage capacity