Abstract: Based on the related diseases mortality panel data of 30 regions in China, this paper probed into the relation between mortality of chronic diseases and forest coverage by using ANOVA and panel regression. The result indicates that the higher the forest coverage, the lower the main diseases mortality:for every 1% increase in forest coverage, the lung cancer mortality decreases 1.14/10⁵, and the breast cancer mortality decreases 0.16/10⁵, with the same tendency in other main diseases.The positive result implicates that forests may improve residents’ health.