The invention relates to the technical field of cutting, in particular to a coiled material cutting device. The coiled material cutting device comprises a cutter and further comprises a cutter base. Two supporting rods are symmetrically arranged on the cutter base, and the cutter is connected between the supporting rods in a sliding manner. A side rack is arranged on the cutter. A cutter cavity isformed in the cutter base, a circle of clamping groove is formed in the inner wall of the cutter cavity, and a bottom plate connected with the clamping groove in a sliding manner is arranged in the cutter cavity. The side wall of the cutter base is provided with a sliding opening communicating with the cutter cavity and used for the bottom plate to slide out. The opening wall of the sliding opening is rotationally connected with a gear engaged with the side rack. The bottom plate is provided with a bottom rack engaged with the gear and a bar-shaped cutter groove used for the lower portion ofthe cutter to be inserted, and the side wall of the bar-shaped cutter groove is provided with a friction part used for friction of the cutter. A pull rod groove is formed in one side of the bar-shapedcutter groove, and a bar-shaped communication opening is formed between the pull rod groove and the bar-shaped cutter groove. A push part is arranged in the bar-shaped cutter groove, a pull rod is arranged in the pull rod groove, one end of the pull rod penetrates the communication opening to be connected with the push part, and the other end of the pull rod stretches out of the pull rod groove.By means of the scheme, the cutting efficiency can be improved.