Based on the development of China s forestry and making good use of the data of forest calamities and the growth of forestry economy from 1952 to 2001, the paper analyses the impact of forest calamity on forestry economic growth in China, trying to explore, theoretically, the inherent correlation between the two factors.

According to the general calamity economic theory and research achievements,the writer discusses the problems of forest calamity economics with basic theories and principles,such as concepts,classifications and characteristics of forest calamity,subject and contents of forest calamity economic research,and fundamental theories of forest calamity economic research.

The measure will play a positive role in safeguarding the security of forest resources and reducing the loss of forest disasters.

The paper analyses constituent factor and distinction of forest disaster, and reason and status quo of forest disaster which include pests and diseases of forest,conflagration of forest,and denudation of forest,and point out that drive of benefit is fundamental reason of forest disaster.

The risk of forest fire disasters should be faced and treated since the forest fires can t be avoided.