The invention relates to the field of straw processing equipment, in particular to an efficient processing device of corn straw. The efficient processing device comprises a horizontally-arranged movable mounting plate. A movable wheel is arranged on the right half section of the movable mounting plate, a movable wheel is arranged at the lower left end of the movable mounting plate, a power sourcestructure is fixed to the upper left end of the movable mounting plate, a suspension lifting system is arranged at the left end of the movable mounting plate, and a broken straw collecting bin is arranged at the lower left end of the suspension lifting system. Along with movable breakage and rotary extruding and guiding work, the corn straw is firstly broken and fed, through a prepressing stage, acompression water drainage stage and a compression heating stage, the size of the straw is greatly reduced, meanwhile, eggs in the straw are killed, finally, the straw returns to farmland and is located at certain depth, fertilizer decomposing and next-year farming are convenient, the problem about current-year straw recovery is greatly solved, the organic utilization rate of the straw is increased, the time of recovery treatment is shortened, and the cost of recovery treatment is reduced.