The utility model provides a solar cell welding tool. The utility model relates to the technical field of solar cell production auxiliary tools, in particular to a solar cell production auxiliary toolwhich comprises two welding tongs handles, a containing barrel, arc-shaped clamping plates, a heating assembly and a controller electrically connected with the heating assembly and used for controlling on-off of the heating assembly, and arc-shaped openings used for containing external welding belt heads are formed in the inner sides of the two arc-shaped clamping plates. The utility model provides a solar cell welding tool. Containing cylinders used for containing soldering paste are arranged on the outer sides of the hinged soldering pliers handles respectively. The arc-shaped clamping plates are arranged in the containing barrel, the heating assembly is arranged in the containing barrel to heat soldering paste, finally, the heated soldering paste is introduced into the arc-shaped clamping plates to weld the battery pieces and the welding joints in the arc-shaped clamping plates, and after the soldering paste can effectively wrap the welding joints, the arc-shaped clamping plates onthe two sides are opened to achieve effective welding of the welding joints and new battery pieces.