The utility model provides a rapidly-detached modular beating roller which comprises a main shaft and a plurality of beating knife modules, wherein the three lug-type beating knife modules are uniformly distributed on the periphery of the main shaft; one circumference surface of each beating knife module is provided with six movable knives; each movable knife is fixedly connected between two lugs of each beating knife module by virtue of fasteners and nuts; meanwhile one safety pin is arranged so as to limit the rotate of the corresponding movable knife. The rapidly-detached modular beating roller provided by the utility model can be used for greatly reducing the equipment maintenance labor intensity and the maintenance workload, improving the overall strength of the movable knives and reducing the possibility that the movable knives are damaged in a working process.