The invention relates to a high-voltage combined junction box which comprises a box body and a box cover. A current junction block and a voltage junction block which are mutually insulated and separated are arranged in the box body, junction holes are formed in the current junction block and the voltage junction block, the voltage junction block is provided with at least two voltage outlet holes corresponding to the side wall of the box body, and detachable insulating hole plugs are arranged at two voltage outlet holes. Compared with the prior art, the high-voltage combined junction box has the advantages of convenience in mounting, attractive appearance, reasonable structure and the like.