The invention relates to the field of busbar assembling and welding, in particular to a welding work platform with mobile clamps. The welding work platform with the mobile clamps comprise a frame body, a welding platform and a sliding rail, wherein the welding platform and the sliding rail are arranged on the frame body. The welding platform and the sliding rail are separably arranged. The mobile clamps are arranged on the side, close to the sliding rail, of the welding platform. Compared with the prior art, the multiple mobile clamps are arranged on the welding platform, operators can conveniently adjust the tracks of sliding blocks, and the welding work platform conforms to the human engineering principle in the human arm operation range. The multiple sliding blocks on the mobile clamps are used for conducting one-time positioning on one product, and therefore operation errors caused by multiple times of positioning are reduced, and therefore the dimensional tolerance chain of the product is not affected. The mobile sliding rail and the welding platform are separably distributed, and therefore high-temperature deformation damage, caused by the high temperature of the welding platform, to the sliding rail and the sliding blocks is avoided. A ruler is embedded in the welding platform so that sizing is facilitated, and measuring errors caused by manual measurement are reduced. A welding rod storage box is arranged on the welding platform so that people can obtain welding rods conveniently.