The invention discloses a long-strip-shaped material cutting device. The long-strip-shaped material cutting device comprises a device main frame, a conveyer belt is arranged on one side of the upper portion of the device main frame, a cutting motor is detachably connected to one end of the upper portion of the device main frame, a spindle of the cutting motor is in key connection with a cutting wheel, a plurality of cutter holders are evenly distributed on the outer edge of the cutting wheel, and the cutter holders are detachably connected with cutters; and the end, provided with the cutting motor, of the device main frame is detachably connected with a rolling plate frame through a side support frame and a middle support frame, a plurality of rolling wheels are arranged on the upper surface of the rolling plate frame in a rolling mode, and a cutter avoiding groove is formed in the portion, close to the middle, of the rolling plate frame. According to the long-strip-shaped material cutting device, the structure is simple, installation is convenient, operation is easy, the cutting and segmenting efficiency is far higher than that of manual operation, manpower is saved, the cost is low, and the long-strip-shaped material cutting device is worthy of use and popularization.