Detachable motor rotor dismounting device

The utility model relates to a detachable motor rotor dismounting device which comprises a supporting assembly (1), a roller assembly (2) and a hoisting assembly (3). The supporting assembly (1) comprises a supporting column (11) and a cross beam (12) detachably installed on the supporting column (11). The roller assembly (2) comprises a roller (21) which is arranged on the cross beam (12) in a rolling manner; the lifting assembly (3) comprises two sets of lifting ropes (31) and a sleeve (32), one end of the sleeve (32) is arranged on a motor shaft of the motor (4) in a sleeving manner, the other end of the sleeve (32) is tied and hung through the lifting ropes (31), the lifting ropes (31) are connected with the roller assembly (2), one set of lifting ropes (31) is tied and hung on the sleeve (32), and the other set of lifting ropes (31) is tied and hung on the motor shaft at the other end of the motor (4). Compared with the prior art, the device has the advantages of being convenient to disassemble and assem