Multi-station polishing machine

The invention discloses a multi-station polishing machine which comprises a front-back moving mechanism. A front-back driving air cylinder drives a front-back moving plate to move front and back above a positioning plate, a product chuck used for clamping a product body is installed at the front end of an output shaft of a rotary driving motor, and an up-down rotary driving assembly comprises a left rotary driving air cylinder and a right rotary driving air cylinder. A polishing mechanism comprises a mounting assembly and an up-and-down driving cylinder for driving the mounting assembly to move up and down. A grating encoder assembly comprises a grating encoder and an up-and-down driving assembly for driving the grating encoder to move up and down. According to the multi-station polishing machine, multiple arc-shaped line product bodies can be conveniently polished, front-back polishing of the multiple product bodies is met, all parts of the product bodies can be polished in the direction, it is guaranteed th