Convenient-to-use welding device

A convenient-to-use welding device comprises a sliding rail fixedly mounted in a welding worktable and a welding machine body. The welding machine body is fixedly mounted at the upper end of the leftside of the sliding rail, foot columns are fixedly mounted at the bottom of the welding worktable, foot cushions are arranged at the bottoms of the foot columns, and the sliding rail is internally provided with a first sliding groove with an upward opening part and extending left and right and is further internally provided with a mounting-fixing groove located at the left end of the first slidinggroove and with an upward opening part; a sliding block is mounted in the first sliding groove in a left-right slidable mode, a storing box is fixedly mounted at the upper end of the sliding block, astoring cavity is formed in the storing box, a through hole communicating with the outside is formed in the upper end of the right end of the storing cavity, and a storing groove with a rightward opening part is formed in the