Repair welding system based on low heat input and working method thereof

The invention discloses a repair welding system based on low heat input and a working method of the repair welding system, and belongs to the technical field of in-service low-alloy heat-resistant steel remanufacturing. Comprising a pneumatic vibrator, an adjusting air pressure valve, an air compressor, a direct-current electric welding machine, an inductor and a switch. The positive electrode of the direct-current electric welding machine is connected with a workpiece to be subjected to repair welding. The inductor is arranged between the positive electrode of the direct-current electric welding machine and the workpiece to be subjected to repair A negative electrode of the direct-current electric welding machine is connected with the switch, the switch is connected with the pneumatic vibrator, a vibration head of the pneumatic vibrator is connected with the welding rod, an air inlet of the pneumatic vibrator is connected with the air pressure adjusting valve, and the air pressure adjusting valve is connecte