The invention discloses an electric positioning anchor gear which is of a double-chain-wheel structure. Each chain wheel structure comprises a motor, an anchor chain module and a speed reduction module; the anchor chain module comprises a limiter, a chain stopper and an anchor chain wheel; the speed reduction module comprises a clutch, a brake and a speed reducer; the motor is used for driving the anchor gear; the limiter is used for protecting the motor; the limiter has certain buffering and shock absorption functions; the anchor chain wheel is used for rising an anchor chain; the chain stopper is used for tightening the anchor chain; the clutch is used for enabling the anchor gear to rotate clockwise and anticlockwise; the brake and the speed reducer are used for controlling the moving speed of the anchor chain. The motors of the anchor gear transmits power to the speed reducers through the limiters, and then the power is output after being subjected to deceleration and torque increase by the speed reducers, so that the transmission torque can be limited and the motors can be protected under a condition of an overload or a load to protect the anchor gear; when the anchor gear operates, clockwise and anticlockwise rotation can be realized, and the anchor gear rotates steadily and quickly.