Device for improving welding stability of steel structure and using method

The invention provides a device for improving the welding stability of a steel structure and a using method. Comprising a supporting plate, clamping devices, power devices, lead screws and adjusting devices, the clamping devices, the power devices and the lead screws are arranged on the two sides of the supporting plate respectively, the power devices are connected with the lead screws, the adjusting devices are arranged on the two sides of the supporting plate and connected with the lead screws, and the other sides of the adjusting devices are connected with the clamping devices. The power device can drive the adjusting device and the clamping device to movably cooperate with the steel structure for clamping and welding. The steel structure welding device has the beneficial effects that a steel structure can be welded in a multi-angle adjusting and multi-direction moving mode, and the welding practicability is improved; by improving the fixing mode of the steel structure, the clamping effect of the device is