Abstract: The fluidized bed residue hydrogenation heating furnace is used in harsh working conditions such as high temperature, high pressure and hydrogen. The structural integrity of the furnace is of great significance to the long-term safe operation of the unit. The safety status of TP347H tubes of fluidized bed residue hydrotreating heating furnace was investigated by macroscopic examination, composition analysis, wall thickness analysis, creep test, metallographic analysis and hardness analysis. The results show that the overall macro condition of the furnace tube of the heating furnace is good.The hardness of individual furnace tubes is high, which may be related to the precipitated phase due to the short-time overtemperature caused by fuel fluctuation during the service of the heating furnace and cold work hardening of the furnace tube.The operating conditions of the burner and the flame temperature of the furnace should be cared in the subsequent use of the heating furnace.