Based on the outcrops and seismic interpretation, it was suggested that the strata of Jurassic in the Kashi Depression, Tarim Basin, were continental facies fluvial and lacustrine deposits. The whole succession of Jurassic reflected a complete sedimentary cycle of shallow lake-deep lake-shallow lake facies. The Lower Jurassic Shalitashi Group was attributed to the alluvial fan deposits in a dry-climatic environment. The Kangsu Group in age of late Early Jurassic was a braided fluvial sediments, recording a wet climate. In the Middle Jurassic, the depositional basin expanded, in which the lacustrine and fan-delta sediments took the precedence. The basin was filled by the river and alluvial fan deposits, indicating a dry semi dry-climatic environment again in Later Jurassic.