To study current status of fishery resources and fish diversity in Yunnan Plateau lakes, a survey was earned out in 11 lakes during 2007-2008, Total 39 fish species belonging to 7 orders, 13 families and 33 genera were recorded. Cyprinifomes were the richest, accounting for 65.0% of total fish species. There were 14 native fishes and 25 exotic fishes being recorded during the survey. In terms of species richness, exotic fishes have dominated in each lake. Fish fauna is characteristic o￡ a shifting from the Plateau to the Plain characters. The age structure analysis showed that year 0⁺ and 1⁺ individuals dominated in moet economic fishes. Analysis showed that native species diversity was closely correlated with lake elevatitm and area. The diversity of native species was highest in elevation of 1700-1800m above sea level. There was significant positive relationship between diversity native species and lake area. Some conservation suggestions were gave at the end of the paper.