The chambersite deposit in Jixian，Tianjin is the only one around the world with its economic development value，it occurred in putty crystal dolomites of the second segment of Mesoproterozoic Gaoyuzhuang Formation. In view of the speciality of the deposit，this paper discussesed the metallogenic environment of chambeisite through the analysis of the trace elements.The results showed that Sr/Ba=0125~01284，V/(V+Ni)=0230~0320，Th/U=4356~4898，V/Cr=0.018~0.026，and revealed the little change of the trace elements；the amount of LREE was 6612×10-6~67.90×10-6，the total HREE(including Y)was 18.88×10-6~19.56×10-6，LREE/HREE value ranged from 3.38 to 3.60，Y/Ho=28.25~29.14，δCe was between 0.829 and 0.854，shown as a slightly Ce negative anomaly，δEu ranged from 0.831~0.846，which reflected the slightly Eu negative anomaly.Geochemical data indicated that the metallogenic environment belong to marine facies sedimentary environment，the seawater may in the state of relative oxidation，some terrigenous material added in the metallogenic process of chambeisite.The diagram of Sm/Nd Eu/Sm show that the study area is close to the evaporite from Qaidam Basin in Tertiary，relfecting the chambersite has the similar cause .We further discussesed the specific causes(marine evaporation) of the chambersite formed in the original stage by the interpretation of the boron isotope(δ11B ranged from 1.4 ‰ to 10.7‰).Combined with previous chambersite geochemical data，we made a new explanation about the cause of Dongshuishang chambersite deposit.The deposite should be explained as the cause of marine evaporation，while the process of hydrothermal activity may occur after the formation of chambersite，belonging to the late hydrothermal alteration，and finally resulted the complex geochemical characteristics of chambersite.