The present invention provides a configuration method of breaker protection accessed in a distributed power supply and in a low-voltage power distribution network. The method comprises the following steps of I, determining a network topology structure of the low-voltage power distribution network; II, determining an access mode of the distributed power supply in the low-voltage power distribution network and the load distribution situation of the distributed power supply; III, determining a fault current provided by the distributed power supply; IV, determining a rated current range of a breaker; V, determining the size and the direction of the current flowing through the breaker after different points of the low-voltage power distribution network go wrong; VI, determining the definite value of the three-stage overcurrent protection of the breaker. The method can consider the system fault characteristics, the distributed power supply fault characteristics and the concrete positions of the fault points comprehensively to select and configure the concrete definite value of the three-stage overcurrent protection of the breaker, thereby improving the protection sensitivity greatly, and improving the protection reliability.