The invention discloses a residual mulching film recycling machine. The residual mulching film recycling machine comprises a walking device and a screening plant, wherein the walking device comprises a frame, and two corners in front of the frame are provided with depth limiting wheels, and two corners at the back part are provided with supporting wheels; the middle of the front part of the frame is equipped with a transmission box, and two coulters are arranged in the middle of two depth limiting wheels at the lower part of the front face of the frame; the screening device comprises a conveyor belt, and the conveyor belt is arranged at the upper part of the middle of the frame; the conveyor belt is provided with a power input shaft, and in transmission connection with a power output shaft arranged by the transmission box through a belt; the back part of the conveyor belt is connected with a separating barrel, and the separating barrel is provided with a power input shaft and in transmission connection with a power input shaft arranged by the conveyor belt; the back part of the separating barrel is connected with a collecting frame. The residual mulching film recycling machine has the beneficial effects of being reasonable in structure, and convenient and flexible to use; for the design of the coulter, mulch residue, crop roots, stones and foreign matters influencing on farming beneath the ground surface with a certain depth can be fully collected; the residual mulching film recycling machine can be applicable to the land finishing of a big plot with straws, mulches and other sundries.