The spatial position of sedimentary formation and the basic form of structure in Qaid-am Basin related to Cenozoic stratum are studied using analytical results of regional geolog ical and the earth gravity survey data.The structural boundary and structural system of the Cenozoic basin are set up with the aid of experimental contrast and geological generalization method.The law of coupling deposit formation and dynamic deposit formation of the earth evidence the exis-tence of conjugate deposit formation action in the interior of the Cenozoic basin.The work can be used to predict salt and deposit formation region and screen and select target section of recon-naissance so as to provide basis for the developing and researching mineral resources of salts in the continental basin of China.The analysis of basement structure of the Qaidam Basin as well as Quaternary action of deposit formation indicates there are great prospect for prospecting new salt deposits at the depth of the Cenozoic stratum.By the condition of deposit formation environment,structural belts of deposit formation of five types of salts are defined which can serve as region for future prospecting and promising deposit formation section.