Photovoltaic junction box capable of balancing air pressure

The utility model relates to the technical field of photovoltaic junction boxes, in particular to a photovoltaic junction box capable of balancing air pressure, which comprises a box body, a box cover, a terminal board, a diode and a lead, a voltage-sharing tube is fixedly arranged on the outer wall of the box body and/or the box cover, the voltage-sharing tube is communicated with a cavity formed between the box body and the box cover, and the terminal board is arranged on the terminal board. The air pressure adjusting device is used for adjusting air pressure in the cavity; by arranging the junction box with the pressure equalizing pipe, the pressure equalizing pipe can accommodate gas extruded by the junction box in a heated state and guide the gas into the junction box again when the temperature falls back, so that the pressure in the junction box is always balanced with the pressure of the external environment, and the sealing structure of the junction box is prevented from being damaged by the pressure;