An embodiment of the utility model provides a photovoltaic confluence box, include: many cables, a plurality of fuses, a circuit breaker, an arrester and at least one prevent anti - diode, the one end of m strip cable wherein is connected to photovoltaic group cluster positive pole through the positive input terminal mouth of difference respectively, and the other end is connected to the positive output port through a positive output cable jointly, and m strip cable all is equipped with the fuse, it is anodal that the cluster is organized through different negative pole input ports are connected to the photovoltaic respectively to other n strip cable one end, and the other end is connected to the negative output port through a negative output cable jointly, the circuit breaker sets up on the positive output cable, the arrester is connected between positive output cable and negative output cable, prevent anti - diode setting on the positive output cable or one one of them sharing of m strip cable prevent anti - diode. The utility model discloses can be when local photovoltaic module be sheltered from, reduce to converge the anti - electric current of irritating in the flow box, reduce owing to prevent the power consumption that anti - diode current flow pressure drop arouses.