The invention discloses an outdoor power source box which comprises a power source box body. The upper surface of the power source box body is provided with a rainproof top cover extending downwards toward the periphery, a pair of wire outlets is led out downwards from the middle of the bottom face of the box body, four landing legs are installed at the bottom of the box body downwards in a splayed mode, the lower middle portion of each landing leg is provided with a layer of cable supporting plate, a panel which can be opened and closed is installed on the front face of the box body from one side to the other side through a hinge, and the other side of the panel is provided with a rainproof lock box matched with the box body. The outdoor power source box has the advantages of being reasonable in structure, multiple in function, good in rainproof effect and convenient to use and move, and the outdoor power source box can be widely applied to various construction electricity utilization occasions.