An inverter junction box, comprising: a casing, a cover plate and a knockout pin, a high-voltage busbar terminal, wherein the cover plate is detachably connected with a top part of the casing; one end of the knockout pin is detachably connected with a bottom part of the cover plate, and the other end of the knockout pin can abut against a protection device on the inverter; one side of the casing is provided with a connecting part that is connected with an external cable; and a bottom part of the casing is a hollow structure and abuts against an incoming terminal of the inverter, the high-voltage busbar terminal comprises an insulating body and two conductive columns, and the conductive columns are respectively inserted in the insulating body, characterized in that: in a first orientation of the inverter junction box, the incoming terminal of the inverter are connected to the external cable via the two conductive columns of the high-voltage busbar terminal, in a second orientation of the inverter junction box, the external cable is directly connected with the incoming terminal of the inverter after entering the inverter junction box and does not use the high-voltage busbar terminal, when the knockout pin abuts against the protection device, the high-voltage protection will not be triggered, when the cover plate of the junction box is opened, so that the knockout pin is fixedly connected with the cover plate and separated from the protection device, the high-voltage protection will be triggered. the cover plate is detachably connected with a top part of the casing; one end of the knockout pin is detachably connected with a bottom part of the cover plate, and the other end of the knockout pin can abut against a protection device on the inverter; one side of the casing is provided with a connecting part that is connected with an external cable; and a bottom part of the casing is a hollow structure and abuts against an incoming terminal of the inverter, the high-voltage busbar terminal comprises an insulating body and two conductive columns, and the conductive columns are respectively inserted in the insulating body, characterized in that: in a first orientation of the inverter junction box, the incoming terminal of the inverter are connected to the external cable via the two conductive columns of the high-voltage busbar terminal, in a second orientation of the inverter junction box, the external cable is directly connected with the incoming terminal of the inverter after entering the inverter junction box and does not use the high-voltage busbar terminal, when the knockout pin abuts against the protection device, the high-voltage protection will not be triggered, when the cover plate of the junction box is opened, so that the knockout pin is fixedly connected with the cover plate and separated from the protection device, the high-voltage protection will be triggered. in a first orientation of the inverter junction box, the incoming terminal of the inverter are connected to the external cable via the two conductive columns of the high-voltage busbar terminal, in a second orientation of the inverter junction box, the external cable is directly connected with the incoming terminal of the inverter after entering the inverter junction box and does not use the high-voltage busbar terminal, when the knockout pin abuts against the protection device, the high-voltage protection will not be triggered, when the cover plate of the junction box is opened, so that the knockout pin is fixedly connected with the cover plate and separated from the protection device, the high-voltage protection will be triggered.