雨水失调,旱涝不匀是威胁人民生产、生活的两大自然灾害,特别是旱灾持续的时间越长,危害的面积越广.我省原属温暖湿润的“天府之国”,近期川中地区20多个县连续4年遭受严重干旱,有的县、社群众生活用水都困难.从森林生态平衡观点分析干旱的变化规律,再探讨干旱形成的原因和解决的途径. Uneven rainfall and uneven droughts and floods are two natural disasters that threaten the people’s production and livelihood, especially the longer the drought lasts and the harder the area is. The province was originally a warm and humid “land of abundance” and more than 20 recently in central Sichuan Counties suffered severe drought for four consecutive years, and some counties and communities are having difficulties in their daily life.According to the forest ecological balance, the paper analyzes the changing rules of drought and then discusses the causes and solutions of drought.