Chongqing Yunyang Longgang National Geological Park is a typical representation of Karst landform with many types of geological heritages .It is of high value in scientific research and strong typicality and is also worth enjoying .In particular ,the Longgang karst Tiankeng is famous at home and abroad .This paper discusses the cause of Longgang karst Tiankeng on the basis of systematic research of regional geologic background , distribution ,classification and important features of geological heritages ,and also provides a comprehensive landscape evaluation by using the combination of qualitative and quantitative evaluations .This paper provides not only a valuable knowledge of the present situation of Longgang National Geological Park ,but also a principle of classification on landscape evaluation .%重庆云阳龙缸国家地质公园为岩溶地貌的典型代表，区内地质遗迹景观类型多，科研价值高，典型性强，观赏价值高，尤以龙缸岩溶天坑闻名海内外。在研究区域地质背景，地质遗迹分布、分类及重要特征的基础上，对岩溶天坑的成因进行探讨，并综合运用定性与定量评价相结合的方法对岩区地质遗迹进行综合评价。
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