NOVELTY - A methane desulphurization device of compost reactor comprises thermometer (1), upper sealing cover (2), reactor (3), air inlet pipe (4), lower sealing cover (5), diffused-air sieve plate (6), compost filler stacking position (7), gas collecting tube (8) and air outlet pipe (9), where thermometer passes through small hole on upper sealing cover to enter into reactor, lower end is inserted into the compost filler stacking position; the upper sealing cover and lower sealing cover are fixed to upper and lower ends of reactor.    USE - As methane desulphurization device of a compost reactor (claimed).    ADVANTAGE - The methane desulphurization device provides low cost, and is high in efficiency.    DETAILED DESCRIPTION - A methane desulphurization device of a compost reactor, comprises thermometer (1), upper sealing cover (2), reactor (3), air inlet pipe (4), lower sealing cover (5), diffused-air sieve plate (6), compost filler stacking position (7), gas collecting tube (8) and air outlet pipe (9), where the thermometer passes through a small hole on the upper sealing cover to enter into the reactor, a lower end is inserted into the compost filler stacking position; the upper sealing cover and the lower sealing cover are fixed to upper and lower ends of the reactor; the air inlet pipe enters from the bottom of the reactor and is bent downwards in the center of the reactor; the diffused-air sieve plate is fixed into the reactor; the compost filler stacking position is located on the diffused air sieve plate; the upper part is not greater than the scale lien on the outer wall of the reactor; the gas collecting tube is fixed to the lower part of the upper sealing cover; small holes are uniformly distributed on the pipe wall; the air outlet pipe is connected to the center of the gas collecting tube and is fixed to the upper sealing cover.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of methane desulphurization device.    Thermometer (1)    Upper sealing cover (2)    Reactor (3)    Air inlet pipe (4)    Lower sealing cover (5)    Diffused-air sieve plate (6)    Filler stacking position (7)    Gas collecting tube (8)    Air outlet pipe (9)