Abstract: Some typical cases of building structure collapse in fire and buildings that did not collapse after long-term fire in China in recent years were summarized. The process and key technologies of collapse monitoring and early warning were introduced. The research situation of monitoring and early warning of building structure collapse in fire in recent years was summarized. The analysis shows that there are many related studies on collapse monitoring and early warning using structural deformation, temperature, vibration and other characteristic parameters, but it is in the stage of theoretical research, which is still far from practical application. Facing the actual needs of fire rescue, convenient, easy-to-use, accurate and effective system and multi-method combination of collapse monitoring and early warning methods are worthy of attention.

Key words: building fire, firefighting and rescue, monitoring of collapse, early warning of collapse