Abstract: This paper discusses types of the textures, petrology of dolomite, stable carbon and oxygen isotopic compositions and trace elements of the major members of Meso-Paleozoic dolomite in Jiangsu, Anhui, Hunan, Hubei, Sichuan and Yunnan provinces. Through this study, we came to know that the textures of dolomite can serve as objective sign of the environment of dolomitzation, and stable isotopic compositions of carbon and oxygen and trace elements can throw light on the properties of the medium of dolomitzation. These data can be regarded as important environmental indicators of dolomitzation. This paper also studies conditions and factors for retaining original fabric of calcium carbonate in dolomite from viewpoint of the environment.