Active short circuit control circuit and control method

The invention relates to an active short circuit control circuit and a control method. The active short circuit control circuit comprises a sensor, a bus current detection circuit, a main control chip and an active short-circuit circuit. The sensor is connected with the bus current detection circuit; the sensor comprises a current sensor and a voltage sensor; the bus current detection circuit is connected with an input port of the main control chip; and the main control chip is connected with the active short-circuit circuit through a main control chip port output module. Through improvement of the bus current detection circuit and the active short-circuit circuit as well as structure improvement of the active short-circuit circuit under the condition of failure of the main control chip, execution of active short-circuit control is realized.