Reinforcement cage welding auxiliary tool

The utility model relates to a reinforcement cage welding auxiliary tool which comprises a fixing rod, a positioning rod used for clamping a fixed main reinforcement and a limiting assembly used for positioning a to-be-fixed main reinforcement, and the first end of the positioning rod is fixed to the fixing rod; the limiting assembly comprises a limiting plate arranged on the fixing rod in a sliding and sleeving mode and a fastener used for locking the limiting plate on the fixing rod. The fixing rod is a screw rod, and the fastener is a nut which is screwed on the fixing rod and located on the side, back to the positioning rod, of the limiting plate. The spacing between the two main reinforcements is controlled by simultaneously limiting the previous main reinforcement and the next main reinforcement through the positioning rod and the limiting plate, so that the technical problem that the spacing of the main reinforcements of the reinforcement cage is inaccurately controlled in the prior art is solved. By m