NOVELTY - A biomass pellet fuel is produced by (A) crushing, (B) tempering and aging, and (C) blowing for cooling, dehydrating and stirring, (D) extruding and shaping, and (E) drying. The step (A) includes crushing biomass material until grain diameter is below 200 mm. The step (B) includes spirally stirring crushed biomass, pressurizing, squeezing, kneading, and mechanically crushing, to improve granularity and flexibility of biomass. The biomass is naturally heated, and active organic materials such as bound water and tar are squeezed out to form natural binding agent.    USE - Method for production process of biomass pellet fuel (claimed).    ADVANTAGE - The method has good production continuity, large application range, low energy consumption, easy shaping and high production efficiency. The produced fuel is convenient for transporting and storing.    DETAILED DESCRIPTION - Biomass pellet fuel is produced by (A) crushing, (B) tempering and aging, and (C) blowing for cooling, dehydrating and stirring, (D) extruding and shaping, and (E) drying. The step (A) includes crushing biomass material until grain diameter is below 200 mm. The step (B) includes spirally stirring crushed biomass, pressurizing, squeezing, kneading, mechanically crushing, to improve granularity and flexibility of biomass. The biomass is naturally heated, and active organic materials such as bound water and tar are squeezed out to form natural binding agent. The step (C) includes stirring and dehydrating biomass raw material, and controlling moisture content at 15-25%. The step (D) includes obtaining biomass pellet fuel whose grain diameter is lower than 20 mm. The step (E) includes controlling moisture content of biomass pellet fuel under 15%. An INDEPENDENT CLAIM is included for a production complete device for which comprises biomass crusher, blower, shaping extruder, drier which are arranged in turn. A tempering aging machine is arranged between the biomass crusher and blower. The biomass crusher is connected with tempering aging machine via material transmission pipe. The material outlet port of tempering aging machine is connected with material inlet port of the blower. A belt material transmitter is arranged between blower and shaping extruder. A belt material transmitter is arranged between shaping extruder and drier. The tempering aging machine comprises base seat, electric motor which is fixedly arranged on base seat, bearing seat and shell. A transmission shaft is arranged on bearing seat via a bearing. One end of transmission shaft is connected with electric motor via a transmission device while other end is fixedly connected with main shaft arranged in the shell. The front end of shell is provided with material feeding slot while tail end is provided with tapered section for forming material discharging port. The inner wall of the shell arranged on lower side and the rear side of material inlet slot is fixedly provided with axial square grinding strips. The main shaft is fixedly provided with spiral blades having sawteeth. The thread pitch of spiral blade arranged in the tapered section is progressively reduced The seamed edge of grinding strip is provided with cutting edge. The outer side of material discharging hole arranged on tail end of housing is provided with bore plate which is tightly stuck with housing. The bore plate is provided with shaping holes whose front ends are cutting edges. Two sides of slot are provided with two material feeding shafts whose directions are same with main shaft. The material feeding shaft is fixedly provided with material prodding rods. Two material feeding shafts are connected with a material feeding motor via feeding transmission device.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic diagram illustrating a production process of biomass pellet fuel.