Abstract: Objective To realize the natural performance of cadaver decomposing process, so that to provid basis data for forensic postmortem interval estimation. Methods A cadaver was laid under natural outdoor environment, and the everyday detail process of its decomposition accompanied with corresponding temperature were recorded respectively. Results The material about the changes of the cadaver corrupt and decomposing process were collected. Conclusion Comparative accurate basis for determinating the later postmortem interval was offered.

Key words: cadaver, tissue decomposition, necrophilia fly, death time