NOVELTY - Dry fermentation device for using high concentration solid raw material to prepare biological fuel gas, comprises: dry-type anaerobic reactor that comprises reactor tank, upper part of gas-guide tube (29) is set on reactor tank, upper end of top cover is set on reactor tank, feeding port is set on top cover, rotary spraying device and distributing device are set in reactor tank, lower end of dry-type anaerobic reactor comprises baffle (15) and spiral discharging device (16), and conical bottom of reactor has filtrate circulating outlet and leakage fluid dram.    USE - As dry fermentation device for using high concentration solid raw material to prepare biological fuel gas (all claimed).    ADVANTAGE - The dry fermentation device for using high concentration solid raw material for preparing biological fuel gas by dry fermentation device provides reasonable raw material distribution, even inoculation, total organic degradation, easy discharge with solid-liquid separation, does not cause secondary pollution, and provides biogas residue fertilizer having high solid content, thus can utilize agricultural organic waste.    DETAILED DESCRIPTION - A dry fermentation device for using high concentration solid raw material for preparing biological fuel gas, comprises: dry-type anaerobic reactor that comprises reactor tank, upper part of gas-guide tube (29) is set on reactor tank, upper end of top cover is set on reactor tank, feeding port is set on top cover, rotary spraying device and distributing device are set in reactor tank, locking window (24) is set on upper end of reactor tank and lower end of reactor tank has assistant discharging port (14), lower end of dry-type anaerobic reactor comprises baffle (15) and spiral discharging device (16), conical bottom of reactor has filtrate circulating outlet and leakage fluid dram, rotary spraying device is composed of motor, coupling/joint, shaft, upper end of closed water pipe, liquid distributing groove, spraying pipe, spraying hole, water pipe joint, and liquid supply pipe, where shaft passes through cover, shaft and upper end of joint are connected with output shaft of motor, lower end of joint is connected with upper end of closed water pipe, upper end of closed water pipe is connected with lower end of hollow part with groove, spraying pipe is provided with spray holes, upper end of closed water pipe, lower end of hollow part with groove, lower end of water pipe joint, and liquid supply pipe or feed pipe are connected by circulating pump to liquid circulating outlet, distributing device is composed of power device, push rod, sealing component and arc-shaped shovel, power device by push rod is connected with arc-shaped shovel, push rod through sealing component is connected into baffle plate of reactor tank body that is cone shape, large end wall of reactor body and smaller opening end with spiral discharging device are in seamless connection, baffle plate and bottom hole are provided with spiral discharging device, and shell is composed of inner support and filter member. An INDEPENDENT CLAIM is included for method for using high concentration solid raw material for preparing biological fuel gas by using dry fermentation device, involving: mixing and pre-treating high concentration solid raw material in dry-type anaerobic reactor tank body, adjusting pH to 6.5-7.5, by using rotary spray evenly spraying inoculum on surface of material such as permeable gaps between material are uniformly inoculated, performing anaerobic dry fermentation process, discharging formed discharge and collecting by exhaust pipe, collecting leachate from bottom of reactor, where every 2 hours inoculums is pumped into reactor through circulating pump of rotary spray system for repeatedly spray inoculating raw material, completely fermenting raw material, after finishing fermentation, discharging biogas residue from spiral discharging device by automatic discharging, and at same time, separating solid and liquid in discharge process.    DESCRIPTION OF DRAWING(S) - The figure shows direction view of the dry-type anaerobic reactor.    Assistant discharging port (14)    Baffle (15)    Spiral discharging device (16)    Locking window (24)    Gas-guide tube (29)    Air hole (30)    Water sealing device (31)    Exhaust pipe (32)