Encoder reset device and encoder reset method

The invention relates to an encoder reset device and an encoder reset method. The encoder reset device comprises a switching power supply module, an adjustable power supply module, a control circuit and an encoder interface circuit, wherein the switching power supply module is connected with the control circuit and the adjustable power supply module separately; the control circuit is connected with the encoder interface circuit; the encoder interface circuit is used for being connected with an encoder of a motor; and the adjustable power supply module is used for being connected with a three-phase terminal of the motor. Preset current is output to the motor through the adjustable power supply module, the motor is locked at the preset position, the control circuit is connected with the encoder of the motor through the encoder interface circuit and the encoder of the motor is cleared and reset, so that fast and efficient resetting of the encoder of the motor is achieved; the reset efficiency of the encoder is e