The invention discloses a starting circuit, which belongs to the technical field of power generation. The starting circuit comprises a motor, a starting resistor, an electronic switch and a contactor,wherein the motor is connected with the starting resistor in series, the electronic switch is connected with the starting resistor in parallel, the electronic switch is used for being switched on toshort-circuit the starting resistor in the starting process of the motor, the contactor is switched on to short-circuit the electronic switch after the motor is started, and the electronic switch restores the cut-off state. The voltage drop of the electronic switch after conduction is smaller than the voltage drop of the starting resistor before short circuit, so that the voltage values of the twoends are smaller when the contactor is closed and conducted, the probability of generating a large arc is reduced, and the probability of burning or sticking a contact of the contactor is also reduced.