In this paper, through analyzing the cases of heating surface explosion forthermal power plant, the macroscopic and microscopic features of heating surface explosioncaused by long-term overheating, short-term overheating, wear, intergranular corrosion,hydrogen embrittlement, high temperature sulfur corrosion and original defect weresummarized. Meanwhile the mechanism of different failure types for boiler tube wasrevealed and the related precaution was presented to avoid unnecessary shutdown forthermal power...