The utility model relates to auxiliary equipment in machining, in particular to an electric four-station rotary wrist, which comprises a frame of an electrical control device and a rotary wrist mounted on the frame. The electric four-station rotary wrist is characterized in that the rotary wrist comprises an output shaft, a positioning disk, a driven wheel and a rotation position ordering disk, the output shaft is rotatably mounted on the frame, and the positioning disk, the driven wheel and the rotation position ordering disk are fixed onto the output shaft. Four 'U'-shaped positioning grooves are uniformly distributed on the circumference of the positioning disk, a positioning pin matched with the 'U'-shaped positioning grooves is mounted at the end of a piston rod of a positioning cylinder, and the positioning cylinder is fixed onto the frame. A position sensor is mounted on the frame and matched with the rotation position ordering disk, a driving wheel is fixed onto an output shaft of a motor with a speed reducer, a cog belt or a chain is mounted between the driving wheel and a driven wheel, and a connecting plate for mounting of a claw is fixed to one end of the output shaft. The electric four-station rotary wrist has the advantages of simple and reliable structure, low cost, small size, simplicity in mounting and adjustment, easiness in maintenance, lightness in weight, convenience, attractiveness and the like.