In order to realize the disk type workpiece automatic machining,the main engine structure and mechanical transmission mechanism of the vertical and inverted lathe with top and bottom spindles were designed.Aiming at to overcome the workpiece axial run out error caused by the clearance of the chuck claws,the working theory of the back pulling slant cylinder chuck was discussed,and the calculation formulas of the clamping force and back pulling force were derived.In order to realize the automatic blanking function of the vertical and inverted lathe,a pneumatic grip structure was designed on the turret station,and the tool interference diagram was studied.Hydraulic and pneumatic system for controlling vertical and inverted lathe spindle chuck and turret clamping and unclamping was designed.Taking brake disk as typical instance,the machining process was analyzed based on the vertical and inverted lathe.