The invention discloses a small ship electric propeller autopilot device which comprises a master control box and an electric propeller which are installed on a stern clamping plate. A master control circuit, a battery pack and an autopilot motor are arranged in the master control box. An electric front operation remote control unit is arranged at the outer portion of the master control box. A driving bevel gear is arranged on a main shaft of the autopilot motor. A driven bevel gear is arranged on a main shaft of the electric propeller. The electric front operation remote control unit is electrically connected with the master control circuit to control the autopilot motor to drive the driving bevel gear to rotate, power is then transmitted to the driven bevel gear in a gear engagement manner to drive the main shaft of the electric propeller to rotate, and therefore the sailing direction of a small ship is controlled. By the adoption of the small ship electric propeller autopilot device, the manner that a handle needs to be manually operated and rotated originally is changed into the manner that the autopilot motor is remotely controlled, so that autopilot rotation is controlled through gear transmission, stern autopilot operation can be changed into electric front operation, and the autopilot operation view is wider and safer.