The utility model provides a damage preventing pipe that punctures, the device includes flexible sleeve pipe, pjncture needle and aspirator, is provided with Y shape mouth at the root of flexible sleeve pipe, and the aspirator is connected to the one end of Y shape mouth, and the other end is provided with anti -spilling apparatus, when the pjncture needle used, it was intraductal to insert flexible sleeve from anti -spilling apparatus, the lateral wall of pjncture needle be provided with with the spy water side opening of pjncture needle inner chamber intercommunication, visit the water side opening when pjncture needle injects the flexible sleeve pipe and communicate with Y shape mouth, the pjncture needle inner chamber communicates with pjncture needle needle point position's pinhole. Puncture and pump drainage liquid are all accomplished in closed system. After extracting the pjncture needle during last flowing back, accomplish pump drainage liquid process by flexible sleeve pipe 1 in the body cavity, the steel needle is not in vivo and the intense strain that generates so the patient can not produce. The doctor just can accomplish pump drainage liquid process and needn't worry the condition such as the steel needle meets accident in vivo alone, has reduced intensity of labour.