The CNC rebar cage roll welding machine can automatically form a rebar cage with a length of 2m-27m at one time. It has higher production efficiency than manual lashing cages, saves materials, and the cage is sturdy and has a standard appearance. It is widely used in the construction of cast-in-place piles in large-scale bridges, high-speed railway construction and other fields. Rebar cage roll welding machine is mainly composed of drag guide rail, console, drag drive system, main bar rack, rebar cage hydraulic support device, fixed rotary drive mechanism, mobile rotary drive mechanism, main bar fixer, main bar conduit, main bar bearing separation system, stirrup release frame, stirrup straightening mechanism, main bar feeding system.