Abstract: Cuiguan bear was planted for many years in Jianning of Fujian Province. But in recent years the abnormal leaf-dropping is serious due to poor management. After investigation and analysis, the main causes attributed to unsuitable application of chemical fertilizer, environmental deterioration and the aggravation of diseases and insect pests harm. Based on these causes, the preventive measures were proposed, including scientific fertilization, improving habitat conditions and scientific disease and pest control.