The invention relates to a reverse power protection method applicable to a self-generation self-use grid-connection mode distributed photovoltaic power station. The reverse power protection method comprises the following steps that the value and direction of real-time power of grid-connection points of common coupling are monitored, the monitored real-time power magnitude is compared with the rated power of the photovoltaic power station, and if the reverse power exceeds the set value of the rated output power of the photovoltaic power station, the output power of inverters is reduced step by step and timekeeping is conducted; if the time exceeds the time threshold, grid-connection disconnectors of all slave photovoltaic power stations are removed step by step. The reverse power protection method reduces the impact on a power distribution network, prolongs the service time of photovoltaic power generation and reduces the power utilization cost of users, a power regulating system is scientific and reasonable, and therefore the requirements of scientific research and engineering application in the fields relevant to the self-generation self-use grid-connection mode distributed photovoltaic power generation can be met.