Abstract: According to an integrated survey in southwest China, this region is facing a series of ecological crisis such as rapid population growth, land reduction, forest ecosystem degeneration, severe soil and water erosion, acid rain, air and water resource pollution, more frequent natural disasters and deterioration of ecological environment. The causes of ecological crisis in southwest China and its effects on local economy, human health and regional development are analysed.This paper aims to perspect ecological environmental problems facing China today through analysing ecological crisis in its southwest part.

Key words: forest, biomass, carbon storage, carbon rate, Northeast China forest area