The present invention relates to a assembly and disassembly device for automobile tire, comprising a device case (41), an upright (42) disposed on the device case (41), a tire dismantling tool connected to a cross beam of the upright (42), and a workbench (44) disposed below the tire dismantling tool (43) and located in the device case (41). The device case (41) is internally provided with a combined compound gearbox (46); the main shaft (31) of the motor penetrates the case; the lower end of the main shaft (31) in the device case (41) is in an engaged connection with a motor gear (36) disposed in the case. The motor gear (36) brings the main shaft gear (35) sleeved on the upper part of the main shaft (31) through a drive gear to drive the workbench (44) connected with the main shaft (31) for it to work. Compared with the prior art, the present invention has the advantages of obvious energy-saving effects, reduction of transmission consumption, long service life, etc.