To explore the relationship between dolomite genetic models and sedimentary facies, on the basis of summarizing a large number of literature. The characteristics of petrology and sedimentary geochemistry of dolomite formed by evaporative pump model, seepage reflux model, burial model and microbial model in different sedimentary facies were analzed. The results show that evaporative pump model dolomite is formed in tidal flats and lagoons. Dolomite is dominated by mud-microcrystals and coexists with gypsum rock. Dolomite produced in tidal flat environment has evaporation and exposure characteristics such as bird's eye and mud crack, but the lagoon does not. The overall order degree and Mg/Ca ratio of this model are the lowest compared with the seepage reflux model and burial model. MgO-CaO shows a linear positive correlation.Rich in Na and Sr elements, but lack of Fe and Mn elements, under the cathode ray, it does not emit light or emits weak light. The δ18O and the δ13C are shifted in the positive direction; The seepage reflux model is an extension and evolution of the evaporative pump model. Dolomite can be formed in tidal flat, lagoon and open platform shoal. The dolomite in tidal flat environment is mainly composed of powder crystals, in lagoon environment is mainly powder-fine crystals, and in open platform shoal is mainly powder-fine crystals, and medium crystals can also be seen. The overall order degree and Mg/Ca ratio of the model are slightly higher than those of the evaporative pump model. MgO-CaO shows a linear negative correlation.The content of Na, Sr, Fe and Mn is similar to the evaporative pump model. Under the cathode ray, a few do not emit light and most of them emit dark brown light. Both the δ18Oand the δ13C are shifted in the positive direction, but the degree of δ18O shift is not large; The burial model dolomite can be formed at the margin of the platform and the inner beach of the platform. Dolomite is mainly powder-medium crystals, the coarsest can reach coarse crystals. The overall order degree and Mg/Ca ratio of this model are higher than those of the evaporative pump model and the seepage reflux model. MgO-CaO shows a linear negative correlation. Lack of Na and Sr elements, but rich in Fe and Mn elements, Under the cathode ray, the brightest light can be seen, and the ring edge with stronger light can also be seen. The δ18O and the δ13C are shifted in the negative direction; Microbial model are often associated with evaporative pump model and seepage reflux model. Dolomite can be formed in the tidal flat and lagoon environment. It can form stromatolite dolomite, clotston dolomite, dendritic dolomite, nucleated dolomite, pellet dolomite and foam sponge dolomite. The sedimentary facies zones formed by the above four types of dolomite genetic models have similarities, but all of them can be distinguished by petrological and sedimentary geochemical characteristics.