Abstract: Cihai iron ore deposit is a subvolcanic-ore pulpintru sive-hydrothermal scouring replacement deposit,which is occurred in the rift of the southern margin of the Eastern Tian shan Mountains in the Lower Permian epoch. Through opencut mining of Cihai hidden iron ore deposit in recent years,it is found that there are multip eriodic diabase walls penetrated the steeply north-inclining ironore bodies in different directions in early postmineral period so as to destroy the in tegrity of the ironore bodies and divide them in to many small southinclining bodies. By survey and m app ing,the authors a scerta in that the ma in bodies con sist of two bulky lens-shaped bags of ore with 340° direction of dip and 70°～80° angle of inclination. In fact,those small south-inclining bodies are the main ironore bodies postminerald iabase walls dismem bered and their occurrence is the pseudo-occurrence of the main ironore bodies. In this article,the authors recon struct the shape of ironore bodies and the metallo tectonic model of Cihai iron ordeposit.