The invention relates to the technical field of coiled material processing, in particular to a waterproof coiled material winding and cutting system. The system comprises a storage mechanism, a firstconveying mechanism, a box body, a transposition mechanism, a winding mechanism, a limiting mechanism, a second conveying mechanism, a cutting mechanism, a traction mechanism and a conveying belt. According to the system, the end part of a coiled material can be fixed through clamping of an upper supporting block and a lower supporting block, so that when the next coiled material is wound, the endpart of the coiled material can be directly conveyed, and the processing continuity is guaranteed; the limiting mechanism and sheltering covers of a telescopic mechanism can guide movement of the coiled material, so that the coiled material can enter the corresponding shielding cover accurately, the coiled material can also be wound on a small rolling column partially, so that when the small rolling column rotates, automatic winding can be carried out rapidly, and the coiled material cannot fall off; and electromagnets at the two ends of the winding mechanism can lose magnetism when the winding mechanism moves to the bottommost end, so that the winding mechanism which finishes winding can fall onto the conveying belt.