Abstract: Boiler ignition is an important part of unit startup, playing a crucial role in the safety and economy of the entire unit operation. Especially after our company's # 1 and # 2 boilers changed the micro oil burner of the E-layer to plasma, plasma leakage and unsuccessful arc pulling often occur. In the early ignition stage, the combustion inside the furnace is unstable, and two or more plasma arc extinguishing can cause boiler fire extinguishing. This article investigates and analyzes the causes of boiler plasma faults, proposes solutions, improves the reliability of the boiler plasma system operation, ensures a successful start after boiler ignition, and lays a solid foundation for the company in clean and low-carbon power generation.