Combined pulley

A combined belt pulley which is appropriately assembled on an output shaft of a motor, and comprises a wheel cased on the output shaft, a ring kit which is cased between the output shaft and the wheel and is provided with a ring kit, a plurality of first locking screws used to firmly lock the ring kit and the wheel, at least a compressing element arranged between the ring kit and the output shaft, a gland rejecting to the compressing element and a plurality of second locking screws used to firmly lock the gland and the ring kit. In this way, together with output shafts in different sizes, the wheel can be used for manufacturing ring kits and glands in different sizes, so as to realize the goals of combining interchangeability and batch production.