In order to study the geochemical and sedimentological record of environmental changes in the the Anisian Luoping Biota, 50 fresh samples were collected from the Member II of the Middle Triassic Guanling Formation, Dawazi section.and analyzed for major and trace elements. The low K、Na concentration and Mg/Ca ratio, indicating a warm and humid paleoclimate. The high Sr/Ba ratio (1.22~68.96, averaged 24.35) and magnesium/aluminium ratio (m=100× MgO/Al2O3, 27.22~27400, averaged 1432), moderate or weak LREE depletion, and low Y/Ho ratios, similar to the characteristics of REE patterns of nearshore estuarine sediments, indicating that the Luoping area is located in a intraplatform basin nearby the land. From bottom to top of the section, Al, K, V, Ti and P concentrations and Co/Ti, Ni/Ti ratios, show repeated fluctuations, reflecting frequent change of the sea level. It is confirmed that two large scale sea level rise events occurred during the deposit time of the Luoping area. The high V/(V+Ni), V/Cr, Ni/Co, and U/Th ratios, and δU, lg(Ce/Ce*) values, reflect low energy, anoxia conditions in this area. Redox sensitive elements such as V, U, Co, Ni, Zn and Cr change in multiple cycles in the section, indicating overall anoxia of the bottom water with intermittent reoxgenation related to the sea level change. Based on the stratigraphical and geochemical data, it is concluded that the Luoping area is located in an intraplatform basin during the Middle Triassic Anisian. The climate was warm and humid. The bottom water was anoxic in general with periodical reoxgenation associated with sea level change.