Using different power to drive the piston shaft, driven high pressure spray nozzle reciprocating motion, supporting the use simple water filter to solve nozzle clogging, however high pressure water can efficiently through needle nozzle flush paper pilot nets, rotary screen and blanket, thickener and a variety of washing equipment; Or wet blanket with a fan nozzle. The best flushing effect is achieved. Namely, reciprocating a secondary blanket blanket