The invention relates to a cutting device, and particularly relates to an efficient cutting device of a hardware steel pipe. The invention aims to solve the technical problem of providing the efficient cutting device of the hardware steel pipe, which has the advantages of high cutting efficiency, high cutting speed and time and labor saving. In order to solve the technical problem, the invention provides the efficient cutting device of the hardware steel pipe. The efficient cutting device comprises a placing platform, an electric manipulator, a support rod, a sliding block, a first spring, a baffle, a sliding rail, a lifting rod, a guide plate, a fixed plate, a contact roller, a small belt pulley, a cam, a left bracket, a top bracket, a first belt, a gear motor, a double-groove belt pulley, a reeling wheel, a big belt pulley, a pull wire, a second guide wheel and the like, wherein the left bracket and the like are arranged at the bottom of the top bracket in sequence from left to right. The efficient cutting device has the effects of high cutting efficiency, high cutting speed, time and labor saving, novel design, convenience in use, easiness in operation, high practicability, high safety in operation and difficulty in damage, and economic benefits are increased.