The medium-short term prediction and monitor process of the Lijiang M_S7 earthquake on Feb.3,1996 of Yunnan province is introduced.Seismicity trend before the earthquake was forecasted according to seismicity feature and commensurable characteristics of strong earthquake activities of Sichuan and Yunnan areas.Since Oct.,1995,a lot of kinds of the anomalies with large amplitude,such as radon and CO₂ contents in groundwater and groundwater level etc.synchronized in a wide range of western Yunnan,especially along Zhongdian -Nanjian seismic area.The characteristics of these short-term anomalies are introduced and analysed.According to the anomalous characteristics and distribution of the anomalies,as well as seismicity indices,the author thought that a M 5~6 earthquake may occur in Zhongdian -Lijiang -Jianchuan -Huaping zone the end of Feb.,1996 before and had presented a written prediction to the government of Dali prefecture.