Wire reel and method for calculating using weight of welding wire

The invention discloses a wire reel which comprises a cylindrical body and two limiting rings which are arranged at the two ends of the cylindrical body and extend along the outside, multiple sets of scale marks are arranged on the inner sides of the two limiting rings, and corresponding weights are marked on the scale marks; the invention also discloses a method for calculating the using weight of the welding wire by using the welding wire reel, which is characterized by comprising the following steps of: reading the corresponding weight of the outermost layer of the welding wire before and after construction, and subtracting the corresponding weight of the outermost layer of the welding wire after construction from the corresponding weight of the outermost layer of the welding wire before construction to obtain the using weight of the welding wire; and according to the wire reel and the method for calculating the using weight of the welding wire, the obtaining time is remarkably shortened, and the working e