A method for protecting microgrid feeder includes collecting feeder current and bus voltage, calculating current direction, current variation value and bus zero-sequence voltage value of each feeder,utilizing IEC 61850-GOOSE network communication protocol receives a protection start signal sent by a downstream protection, A sudden change of feed current is adopted to start that protection, the voltage change and current direction are used as the comprehensive criterion to find out the faulty circuit, At the same time, over-current protection is set as backup protection under abnormal communication conditions, which can solve the problem that over-current or directional over-current protection action is not reliable when feeder fault occurs in micro-grid, resulting in power loss of the whole network, and realize fast and accurate fault location and fault tripping isolation. The invention also provides a corresponding feeder protection device.