The invention discloses a traction-type cleaning device for the inner wall of a long straight pipeline, which comprises a casing and a rotating cylinder. The casing is provided with a water tank, a storage battery, an interlocking rotating tube, a motor, a water pump, a catheter and a waterproof film; the casing There is a rotating cylinder on the right side of the body; telescopic support rods, backing plates, supporting springs, supporting side plates, walking rollers, liquid injection pipes and LED lights are arranged on the periphery of the housing; liquid outlet chambers, liquid outlet pipes and Spray head; rotating rod, connecting swing rod, torsion spring and brush head are arranged on the periphery of rotating cylinder; fixed ring and traction rope are arranged on the left end of the housing. The invention adjusts according to the diameter of the pipe through the telescopic support rod and the rotatable connecting swing rod; the motor drives the interlocking rotating pipe to rotate, thereby driving the rotating cylinder, the peripheral rotating rod, the connecting swing rod and the brush head to rotate and clean the pipe At the same time, it cooperates with spraying cleaning liquid to improve cleaning efficiency.