The invention provides a powder production device. The powder production device comprises a feeding unit, a first breaking unit with an inlet connected with an outlet of the feeding unit, a second breaking unit with an inlet connected with an outlet of the first breaking unit, and a screening unit with an inlet connected with an outlet of the second breaking unit, wherein another outlet of the first breaking unit is connected with an inlet of a dust removing unit, and another outlet of the second breaking unit is connected with the inlet of the dust removing unit. According to the powder production device provided by the invention, materials are broken through two-stage breaking systems; and meanwhile the screening unit and the dust removing unit are arranged, prepared powder is small and uniform in grain, the impurity content in the powder is low, and thus the powder with high quality can be prepared through the powder production device provided by the invention. The powder production device provided by the invention is especially suitable for preparing biomass powder, such as straw powder.