The invention relates to the technical field of crushing, in particular to a cloth smashing machine at a low rotating speed. The cloth smashing machine comprises a box, a feeding conveyor belt, a shearing module, a smashing module, a discharging conveyor belt and a controller, wherein the box comprises a shearing box located on the upper portion of the box, a smashing box located on the middle portion of the box and a discharging box located on the lower portion of the box, and the discharging conveyor belt is horizontally arranged and used for conveying cloth material into the shearing box; the shearing module is located in the shearing box and used for conducting primary shearing on the cloth material so that strip cloth material can be formed, wherein the cloth material is sheared intostrips so that low-speed smashing conducted on the cloth material in the subsequent step can be convenient; the smashing module is located in the smashing box and used for smashing the strip cloth material; the discharging conveyor belt is located in the discharging box and used for conveying out smashed rag material, and a storage box used for receiving the rig material is arranged at the tail end of the discharging conveyor belt. By means of the machine, the cloth material can be crushed at the low rotating speed, and noise and heat can be effectively reduced.