A set of evaporite strata consisting of calcium glauberite and rock salt (halite) developed in the early Eocene Xingouzui Formation in the southern margin of the Jiangling depression. The mineralogical and mineralogical evidence shows that the main salt minerals in the salt- bearing strata include rock salt, calcium glauber and anhydrite, which all formed in the environment of perennial salt lake. Calcium glauber is a primary- quasi-synthetic salt mineral. According to the type of mineral salts and sedimentary characteristics and typical warm saline minerals (native) calcium mirabilite extensive development, Yanjing-Shenjindu sub- depression can be inferred in the sedimentary period of Xingouzui formation in the ancient climate for type. According to extensive development of salt minerals (such as calcium glauber) and their depositional type and characteristic, it can be inferred that the climate in the Yanjing- Shenjindu sub- depression was warm during the deposition of the Xingouzui Formation. The δ34S composition of calcium mirabilite is 25‰~33‰, much higher than that of the seawater sulfur isotope (17~19‰) in the same period, suggesting that calcium mirabilite may have undergone bacterial modification. In addition, during the period between Late PalaeoceneEarly Eocene, sulfates in the Yanjing-ShenJindu subdepression may originate from the older sulfite formation in the west.