Abstract: By using the analytical method of the dynamic pattern of groundwater level and using many years' groundwater level data in Yunnan area, the result show that: ① There is a certain proportional relation between annual variation amplitude of Yunnan area groundwater level and intensity of future earthquakes, especially when maximum variation proportion of groundwater level in some year up and down amplitude ＞0.35 or ＞-0.35, the second year will have M_S≥6 intensity earthquakes; ② Groundwater level anomalies corresponding to earthquakes show regional characteristics. The water level corresponds to earthquakes in northeast and northwest Yunnan area is mainly going up, but southwest and west Yunnan area is going down; ③ Since 2000 year, most M_S≥5 earthquakes in Yunnan area take place in groundwater level great gradient belt near extremum area or secondary extremum area of previous year groundwater level up and down.

Key words: Variation proportion of groundwater level, Dynamic pattern, Characteristics of anomaly, Yunnan area