A multi-scale remote sensing porphyry copper deposit exploration model in low vegetation covered area named "abnormal little intrusive rocks structures altered minerals" was proposed to solve the difficulties in mineral exploration caused by multiple interfering factors. The geological background of mineralization was analyzed taken the Balkhash-Western Junggar metallogenic zones as the study area. Lithology, structures and altered minerals were analyzed according to the flow chart of remote sensing mineral exploration. Based on the results, five important prospective areas have been prospected. Among them, three target regions were delineated using large scale altered mineral map, geological map, geophysical map, geochemistry map and the results of the trench sampling.