Bi-station programming tailstock

The invention relates to a bi-station programming tailstock which comprises a pedestal and a tailstock body, and is characterized in that the tailstock body is installed on the pedestal through a sliding body and a switching cylinder, and a telescopic hydraulic chuck mechanism and a hydraulic apex mechanism are installed on the tailstock body. The bi-station programming tailstock is provided with two stations, a telescopic hydraulic chuck and a hydraulic apex, and can clamp the outer ring of a workpiece to process an inner hole and provide auxiliary support for a workpiece or a tier expansion clamp. The chuck can be pulled back integrally to move the workpiece to an auxiliary positioning device. The function of a lathe is enriched, assisting time is reduced, and part processing precision and production efficiency are improved. The bi-station programming tailstock is especially suitable for mass production of parts like cylinder sleeves.