The invention discloses a disassembly process of rotor parts. The rotor parts are mainly composed of a rotor body, a sleeve and an impeller, wherein the sleeve and the impeller are assembled on the rotor body in an interference fit mode. The disassembly process comprises the following steps that 1, the sleeve on the rotor body is heated in a heating mode, and therefore the sleeve can generate thermal expansion on the rotor body, and the sleeve can keep the thermal expansion state; 2, the axial pulling is carried out on the sleeve on the rotor body at the shaft end of the rotor body by adoptinga hydraulic puller, and therefore the sleeve can be taken out from the rotor body; 3, the impeller on the rotor body is heated in a heating mode, and therefore the impeller can generate thermal expansion on the rotor body, and the impeller can keep the thermal expansion state; and 4, axial pushing is carried out on the impeller in the axial direction of the rotor body by adopting a synchronous jack, and therefore the impeller can be taken out from the rotor body. The disassembly process is capable of protecting all the parts well, and has the characteristics of being high in operability, easyand convenient, safe and efficient, good in economical efficiency, reliable, practical and the like.