Vertical lathe driving and indexing system

The invention relates to a vertical lathe driving and indexing system. The vertical lathe driving and indexing system comprises an indexing motor and a hydraulic motor, so that the input power is changed from an original motor and gearbox enlarged gear ring into hydraulic motor direct driving, and meanwhile, the hydraulic motor and the indexing motor can be freely switched; the vertical lathe driving and indexing system further comprises a worm gear, a worm rod, a hydraulic control clutch, a workbench center shaft and a circular grating; the hydraulic control clutch is connected with the workbench center shaft, the worm gear and the worm rod and controls the separation and reunion of the workbench center shaft and the worm gear and the worm rod; the worm gear and the worm rod are externally connected with the indexing motor, the indexing motor is in transmission with the workbench center shaft through the worm gear and the worm rod, the workbench center shaft is fixedly connected with a rotating shaft of a wo