The invention relates to a petroleum, natural gas, shale gas and coal bed gas drilling completing tool, in particular to an anti-scrap sealing structure for a corrugated drum. The corrugated drum sleeves an inner pipe of the device; the upper end of the corrugated drum is fixed on the inner pipe through an upper sealing drum fixer; the lower end of the corrugated drum is connected with an anti-rotating sliding connector through a lower sealing drum fixer; the inner pipe and the anti-rotating sliding connector are connected through an anti-rotating clamping slot; the anti-rotating sliding connector can vertically slide on the inner pipe; a locking mechanism is arranged in the anti-rotating sliding connector and can be locked and connected with the inner pipe. According to the anti-scrap sealing structure, the amplitude of variation of the outer diameter is large, the outer diameter after unsealing is small, the sealing outer diameter is large during a settling sealing process, the adaptation to the annular radial size is high, the anti-scrap effect is good, the suction phenomenon when pull out of a hole is avoided, a torque-transferring function and an axis pulling pressure function are achieved, and the reliable connection of upper and lower pipe bodies is realized.