Sheet metal part welding device with protective structure

The utility model relates to the field of sheet metal parts, in particular to a sheet metal part welding device with a protective structure, which comprises a welding table, an I-shaped table plate is fixedly mounted above the welding table, a back plate is fixedly mounted outside the welding table, and a laser welding machine is arranged on one side of the back plate. Through the arrangement of the positioning clamping groove, the positioning clamping block, the side protection plates, the fixing frame, the micro motor, the sliding lead screw, the threaded sleeve and the transparent front protection plate, when the device is used for welding sheet metal parts, the side protection plates can be installed on the two sides of a welding table through the positioning clamping groove and the positioning clamping block before welding; then a micro motor is started to drive a sliding lead screw to rotate, and a threaded sleeve rotates to drive a transparent front protection plate to rise, so that a protection struct