Abstract: Chemical accidents occur from time to time. The main manifestations of accidents are explosions and fires, which often cause many casualties, economic losses, and environmental hazards, which seriously endanger public safety. This article conducts statistical analysis and research on major hazardous chemical accidents in mainland China in the past decade, covering core information such as casualties, economic losses, hazardous substances, etc., which visually presents the status quo of hazardous chemical accidents in China. From the perspective of hazardous chemical accident investigation mechanism, a horizontal comparison between China and the major developed countries in Europe and America was carried out, and the characteristics of the investigation mechanism in major developed countries in Europe and America were deeply analyzed.

Key words: hazardous chemicals, accident investigation, investigation mechanism