Abstract: The Guomisi-Gadaban polymetallic orefield is located at the south side of the Zoulangnanshan area in north Qilian county where a number of ore deposits including Cu,Pb and Zn have been found lately.All these deposits basically have the same geologic backg round and the mineralization environment.By geology work of several decades,a great deal of prospecting information has been accumulated.This paper tries to establish a description model of geology-geochemistry -geophysics and to seek optimum physical and geochemical method and geological method.