In the solar photovoltaic power generation system, in order to reduce the connection between the solar photovoltaic cell array and the inverter, a certain number of photovoltaic cells with the same specifications can be connected in series to form photovoltaic strings, and then several photovoltaic strings can be connected in parallel to the photovoltaic main current lightning protection box. After converging in the photovoltaic lightning protection combiner box, they are output through a DC circuit breaker and used in conjunction with the photovoltaic inverter to form a complete photovoltaic power generation system, achieving grid connection with the mains.