The invention discloses a straw collecting, crushing and granulating integrated machine and belongs to the field of farm-oriented processing equipment. The straw collecting, crushing and granulating integrated machine comprises a crushing box and a supporting leg. A straw inlet is formed in the upper part of the crushing box, a cutter shaft is connected in the crushing box through a bearing A, a crushing knife is fixedly arranged on the cutter shaft, the cutter shaft is in transmission connection to a crushing motor, a screen is arranged below the crushing knife in the crushing box, a conveying auger is arranged below the screen, the rotary shaft of the conveying auger is in transmission connection to the crushing motor, spiral blades opposite to spiral direction are symmetrically arrangedon the rotary shaft of the conveying auger, a crushed material outlet is formed in the middle of the bottom of the crushing box, and a straw granulator is arranged below the crushed material outlet.By combining straw crusher with the granulator, the straws are crushed uniformly. The problem that the crushed straws are hard to collect in the transfer process is solved, the labor amount is reduced, and the processing efficiency is improved.