The invention discloses an electric fan. The electric fan comprises a shell, a motor, a gear reducer, a rotary disc, blades, a controller, an upper magnetic material, an AC/DC converter, a lower magnetic material, a bending sensor, an amplifier and a wireless receiving module. The rotary disc is fixed to an output shaft of the gear reducer, and the blades are fixed to the rotary disc. The controller is capable of controlling the rotational speed of the motor. The upper magnetic material is provided with an upper coil in a winding mode and fixed under the shell. An alternating current power source is connected with the input end of the AC/DC converter, and the upper coil is connected with the output end of the AC/DC converter through a high frequency generator GF. The lower magnetic material is provided with a lower coil in a winding mode and is fixed to the rotary disc, and the lower coil is connected to a rechargeable battery BT through a rectifying and filtering module ZL and a charging module CD. The lower magnetic material and the upper magnetic material can be closed once for each circle of rotation of the blades. The bending sensor is fixed to one of the blades in an attachedmode. The bending sensor is connected with the input end of the amplifier, and a wireless transmitting module is connected with the output end of the amplifier through an analog-to-digital conversionmodule. The wireless receiving module is connected with the controller through a modem. The electric fan has the beneficial effect of improving safety performance.