Abstract:The main types of degraded ecosystems existed in Southern Yunnan of China and the neighbouring countries as Laos and Myanma are as follows f (1) different man-made ecosystems; (2) various secondary ecosystems and (3) different sizes of fragmental forest etc. In degraded ecosystems, the size of biodiversity loss directly relates with the strength, frequency and temporal lasting of human interference. And in fragmental tropical rainforest, the loss of biodiversity is in-creasing with the increasing strength and temporal lasting of environmental change. Even in the big area of tropical rainforest, biodiversity is reduced as well. Dealing with very complex aspects of social.