The utility model discloses a rapid cutting device for HDPE impermeable film construction. The anti-seepage film cutting device comprises a cutting base, a supporting plate, a cutting mechanism, an anti-seepage film mounting shaft, a length counter, a control device, a rotation driving device and a hydraulic cylinder. The supporting plates are installed at the two ends of the cutting base. The cutting mechanism is movably installed on the supporting plate and located above the cutting base. The anti-seepage film mounting shaft is mounted on the supporting plate and located on one side of the cutting mechanism, the anti-seepage film mounting shaft is connected with the rotary driving device, the length counter is connected with the anti-seepage film mounting shaft, the control device is mounted on the cutting base, and the control device is electrically connected with the length counter, the rotary driving device and the hydraulic cylinder. The anti-seepage film cutting device can achieve automatic cutting of the anti-seepage film, the length of the anti-seepage film can be monitored in the cutting process, the anti-seepage film can be positioned, and therefore the anti-seepage filmcan be accurately cut, and waste of the anti-seepage film is reduced.