| The karst tourist resource is one of the most important geological resources for tourism, but the karst environment is always weak. The statistical figure of karst area is 5. IXIOW, and occupied to 10% the earth surfaces. There are a billion permanent residents in the karst regions; the karst landscapes can be seen in Tibet with an elevation of above 5000m in a. s. 1 or in underground. China possesses about 9. 7X 104km2 the karst territory, and accounts for approximately 1/10 of the whole land surface. The karst mainly distribute among Sichuan, Hubei, Hunan, Guangxi, Guizhou and Yunnan provinces, here is the vastest karst area all over the word. Meanwhile, many of national scenic spots such as Guilin that is called "the most beautiful scenery", Shilin is famous for "the first wonder in the world" and Huanggoushu Waterfall, Maolihe George, Zhejinton, Longon Cave so on. But, it is possibly that the rocky desertification in the karst area of southwest of China is the most serious in China or in the world, the people are poverty and the waste of water and soil is severe. In a word, the damage of karst resources and pollution of karst environment have gravely restricted the sustainable development of tourist industry in this region.Yunnan is one of the widest karst provinces in China, and has abundance and high quality and varied types karst. Yunnan is qualified that is called "a treasure-house of karst tourist resources", and it is valuable for studying and developing in here.Taking Yunnan as an example, this paper first study on the geochemistry traits of karst tourist resources, the distribution patterns and their landscape characteristics, then the causes of formation of karst touristresources. Having compared with the counterparts in home and abroad, this thesis summarized the characteristics and the causes of formation of the karst tourist resources in Yunnan Province, and then put forward to the exploi tation processes and developing policies of karst tourist resources of Yunnan. Finally, make an exploratory study on appraisal contents, appraisal methods and appraisal indexes of karst tourist resources, especially probe into their scientific values, and the methods of environment protection of karst tourist resources.Firstly, this thesis has recalled the studying history of karst tourism earthscience and developing present condition of karst tourist resources. Arming to the current deficiency existing in the classification of karst tourist resource, following the sequence from regional development, emergence, evolution to it's perishing and classify the karst tourist resource, considering to its scientific, appreciative and operative nature. According to the basic law of karst tourist resource developing laws. From characteristics of the overlapping subject of karst tourist resource environment, the broadening the ways to promote the status of the tourist resource, the excavating of the values of tourist resources, as well as the protection of the tourist resource and environment, a new tourist karst resources classify have been put forward. The karst tourist resources can be divided into 3 types and 16 subtypes; the 3 types are karst tourist resources in surface, karst tourist resources in underground and compound karst tourist resources.According to the features of limestone and their structures, on the basis of the karst topographies in Yunnan, this paper put forward the situation and characteristics of Yunnan karst resource developing: the basic situation is: Yunnan has been divided into high mountain and middle mountain valley in northwest fold belt of Yunnan; middle mountain valley in northeast fold belt of Yunnan; plateau basin in fold-anticline beltof feast and middle part of Yunnan; middle mountain feng congC'peak cluster" or "egg box" topography ) basin in fold belt of southeast of Yunnan and middle mountain broad basin in fold belt west of Yunnan province , etc. five types of karst geomorphology. Then, this paper discussed the types, characteristics, distributive pattern and geological ac...
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