Rolling welding machine for bored pile reinforcement cage

A seam welder for a bored pile steel reinforcement cage consists of a dragging guide rail, a fixed rotary driving mechanism, a mobile rotary driving mechanism, a hydraulic supporting device of the steel reinforcement cage, main reinforcement material racks, a paying off mechanism, a welding manipulator, a main reinforcement fixing mechanism and a dragging driving mechanism, wherein, the fixed rotary driving mechanism is arranged on the dragging guide rail; the mobile rotary driving mechanism is used for driving main reinforcements to rotate and move linearly; the main reinforcement material racks are erected on the dragging guide rail; the main reinforcement bearing partition systems are arranged on the main reinforcement material racks; the welding manipulator and the main reinforcement fixing mechanism are used for fixing the main reinforcements and hoop reinforcements together, and the dragging driving mechanism is arranged at one side of the dragging guide rail. The utility model has the advantages of fas