Based on core observation and rock slice identification, combined with the studies on the combination of rock types，fossils，sedimentary texture, sedimentary structure and sedimentary sequence, the Jialingjiang Formation in Danfengchang-Tanghe area is divided into two sedimentary facies including open platform and restricted platform, and further divided into five subfacies and several microfacies. The distribution of sedimentary facies of Jialingjiang Formation was studied, and the sedimentary environment and its evolution were analyzed. It is considered that the carbonate rocks of Jialingjiang Formation has frequent sea-level changes, experienced six evolution stages，and formed three times of larger transgression-regression sedimentary cycle. Each cycle is composed of small subcycles, while small subcycle is composed by a number of little rhythms. After detailed study on the lithology and sedimentary environment, it is considered that the most favorable layers for shallow particles dolomite and beach room dolomite are Jia Ⅰ-Jia Ⅱ1 member of Jialingjiang Formation in Tanghe and Danfengchang area and Jia Ⅱ3member in Tanghe and Linfengchang area.