Abstract: Abstract: During the preservation of the combustion supporting agent material evidence extracted from the fire site, it may be polluted by many factors, which will affect its evidence effectiveness and the judicial justice. This paper combs the relevant research both in China and other countries, introduces the background interference of packaging containers on combustion supporting agent physical evidence, as well as the possible cross pollution and loss of physical evidence, and summarizes the selection of packaging containers. The study can provide reference for the scientific and effective preservation of combustion supporting material evidence.

Key words: Key words: arson by accelerator, fire debris, physical evidence encapsulation, packing containers, preservation performance