The invention discloses a cutter machine for processing finished products for carbon fiber material processing. The cutter machine comprises a cutter, working plates, a bottom plate, limiting rods, a first moving rod, a connecting rod, a push rod, an air pressure telescopic rod, a mounting flange, a top plate, a limiting block, a limiting ring, a limiting column, a second moving rod, a separation rod, a rotating block, a screw rod, a connecting column, a fixing base and a supporting rod. The four corners of the center of the top end of the bottom plate are fixedly connected with the bottom ends of the limiting rods respectively. According to the device, the three working plates and the cutter are arranged so that multiple types of carbon fiber materials can be better processed at the same time, and the working efficiency is improved. Meanwhile, the cutter in the device is placed in a limiting groove formed in the first moving rod, then the limiting block is located in the center of the limiting ring, then the limiting ring is clamped and fixed through movement of the fixing base, a traditional cutter fixing mode is changed, the cutter can be disassembled and assembled easily, and the labor intensity is relieved.