Abstract: Based on the study of the mega and micro ore-controlling structures in the polymetallic ore deposits in Shaliuhenanqu,Dulan,Qinghai Province,the deformation histories of variously trending structures were determined:E-W-trending structure experienced at least three stages of deformation,the NW-trending and the NE-trending structures two stages of deformation each.Therefore,the authors proposed the tectonic development of that area and also discussed the role of the variously oriented structures in the formation of the deposit.