Abstract: The loss of life and property caused by fire accidents is very serious, and the prevention of fire accidents, pay attention to fi re safety is related to the national economy and people's livelihood. In the design of civil buildings, we need to fully consider the fire safety of buildings, fully understand the factors of fire, and effectively reduce the possibility of fire accidents with the help of the efficient application of building fire prevention technology. This paper discusses the fire characteristics of civil buildings, analyzes the fire causes of civil buildings, and studies the application of building fire prevention technology in civil building design, for reference.