Special power supply device for engineering

The utility model discloses a special power supply device for engineering, which comprises a power supply box, a clamping assembly is arranged on the power supply box, the clamping assembly comprises a clamping box, a rotating disc, a clamping plate, a clamping handle and a third screw rod, the outer surface of the clamping box is connected with the third screw rod through a nut, and the rotating disc is arranged on the clamping plate. The third screw rod penetrates through the outer surface of the clamping box, a rotating disc is fixed to one end of the third screw rod, the rotating disc and the third screw rod are connected in a welded mode, a clamping handle is installed outside the rotating disc, and a clamping plate is fixed to the end, away from the rotating disc, of the third screw rod; the clamping box is connected with the power supply box, and the clamping plates are distributed in an axial symmetry mode relative to the horizontal central axis of the clamping box. And the battery power supply main b