Electric actuator

The invention relates to the technical field of actuators, in particular to an electric actuator. The electric actuator comprises a shell, an upper cover, a gear case, an output shaft device and a circuit board, wherein the gear case is arranged in the shell, the circuit board is arranged on the upper surface of one end of the shell and the upper cover covers the circuit board and is fixedly connected to the shell. A motor is arranged on the circuit board, and the output end of the motor is connected with the gear case. The output shaft device comprises an output shaft, a limiting plate, a clamping block and toothed plates. The lower end of the output shaft is inserted into the gear case, is connected to the gear case through clamping teeth in the radial direction in a limited mode and is exposed out of the lower surface of the gear case and is axially connected in a limiting mode through a check ring. A hollow fixing block is arranged at the upper end of the output shaft, the two parallel toothed plates are arranged in the fixing block, and a clamping block is arranged in the fixing block and is arranged symmetric with the toothed plates.