Abstract: Subtropical region of China has a vast area between N34° and N22°, from Qinlin mountains to South Guangdong and Guangxi, from the eastern part of Qinzhang plateau to the coast of China sea. Due to warm climate and abundant rainfall this region is rich in species of living things. Its vegetationtypes are different and various. Among them evergreen broad-leaved forest, regarding as climax, is occurred in the area. But in other region of the world occurring in the same latitudes as ours, the landform is mainly characterized by deserts and arid areas. Thus, subtropical region of China is known as a piece of tresure land. In this paper the significances of evergreen broadleaved forest China in production and scientific research are fully described and evaluated. Such as 1). It has large area, favourable conditions, complex vegetation-types and great growth potential and higher biemass. 2). It is the most typical ones in the world with complex structure of layer and synusia. 3). It has unique characteristics of eas sia flora with abundant endemic, relic and ancient elements. 4). It is rich in the resources of plant and animals, and has great exploitation potential for economic plants. Moreover, in according to the concept of polyclimax, different kinds of natural forests in various geographic conditions of middle subtropic-region are listed. In short, these natural forests are the most valuable natural heritage and they have important value of natural conservation. However, China has a long history of exploitation, so the forest resources, including natural forests, have suffered a severe destruction. It can be proved by a great deal facts mentioned in the paper. The destruction of nature forests result in a series of severe damages in economic and ecology. Finally, against the problems mentioned above, some suggestions and measures of protection on natural forest of Chinese subtropic are put forward. In which the most important one is that some typieal subtropical nature forests should put under international nature-coservation. Thus, these areas can he well conserved and can sereve as the permanent experiment lands.