Welding device convenient to use

The invention relates to a welding device convenient to use. The welding device convenient to use comprises a sliding rail fixedly arranged in a welding workbench, and a welding machine body. The welding machine body is fixedly arranged on the upper end of the left side of the sliding rail; leg columns are fixedly arranged on the bottom part of the welding workbench; foot pads are arranged on thebottom parts of the leg columns; a first sliding slot provided with an upward opening and extending left and right is formed in the sliding rail; an installing slot located in the left end of the first sliding slot and provided with an upward opening is further formed in the sliding rail; a sliding block can be left-and-right slidably arranged in the first sliding slot; an extension and retractionbox is fixedly arranged on the upper end of the sliding block; an extension and retraction cavity is arranged in the extension and retraction box; a through hole communicating with the outer part isformed in the upper end of