Feihong steel cage roll welding machine introduces European technology, the diameter error of reinforcement cage can be controlled within 1cm; the spacing error of reinforcement cage with 1 meter length can be controlled within 5mm; the production efficiency is 3-4 times of that of manual reinforcement cage; the equipment operators only need 3-5 people; the main reinforcement and coil bar spacing of finished reinforcement cage are uniform, and the welding points are full and firm, which can realize the supervision exemption.