Abstract: In this study, we put dead pigs indoors, outdoors and underground respectively, and kept a detailed record of the natural decay process, especially the tension of the pig's abdomen produced by corruptive gas. The result showed that the decay speed was closely related to temperature, humidity, rainfall, position of corPses on the ground, insect parasitism. The obtained data could pro-vide an important referential basis for inferring time after death.

Key words: corpse decay degree, corruptive gas