The north Guangdong mountain is one of the main impoverished region in Guangdong province, the social and economic sustainable development is restricted by eco environment problems such as soil and water loss, poor in water resource, increased frequency in natural drought and water logging disasters, etc. The current situation and the cause of formation of agriculture ecological environment problems in the north Guangdong mountain area are analyzed. It is thought that deterioration of agriculture ecological system is caused by week ecological environment and man made interference for long time. The countermeasures of ecological environment comprehensiv improvement are put forward.