Abstract: Catering places are crowded places, and the current status of the use of liquefied petroleum gas in restaurant places is related to public safety. In order to prevent liquefied petroleum gas explosion accidents in such places, reduce accident losses, this article conducts an on-site survey of a liquefied petroleum gas leak and explosion accident in a restaurant, the accident has been technically analyzed by means of on-site analysis of explosion accidents, equivalent energy analysis, gas diffusion scene analysis, ignition source analysis, etc.， the cause and course of the accident is identified, and similar accident prevention suggestions are put forward.

Key words: dining places, liquefied petroleum gas; explosion, fire investigation