The present invention belongs to the power maintenance equipment technical field and relates to a maintenance power source box. The maintenance power source box includes a box body, a wiring hole anda rain cover, wherein the wiring hole and the rain cover are arranged on the box body, and the box body is provided with a box door which is arranged on the front surface of the box body and can be opened and/or closed with respect to the box body; the wiring hole is formed in the box door; and a maintenance power source cable can pass through the wiring hole so as to be connected with the inner cavity of the box body; the rain cover is located at the outer surface of the cabinet door and is suitable for covering the wiring hole.