Based on the study of the regional tectonic framework and investigations of the Lijiang M_S7.0 earthquake in 1996,the earthquake generating environments are systematically analyzed.Under the action of potential regional nearly NS compressive stress field,the sinistral slip of the NE-strike Lijiang-Xiaojinhe fracture and rig ht-lateral slip of NW-strike Zhongdian-Yongsheng fracture resulted in local and extension environment in the eastern triangle end of Yulongxueshan-Jiuzihai faulted block,at last the no rthend of the nearly NS-strike and dipping-westw ards Yulong xueshan's east piedmont fault was ripped up and the Lijiang M_S7.0 earthquake happened.