Tianzishan Complex Rock is the important ore-controlling rock in Liziyuan and Gaoqiao polymetallic ore concentration area in Western?Qinling.In order to discriminate deep lithological?boundaries of the rock, and separate the field sources due to the superposition effect of multiple field sources,wavelet multi-scale decomposition is used to solve the problem.Based on the analysis of the relationship between mineralization and magmatic activity and the characteristics of aeromagnetic anomalies, the new understanding of prospecting direction is put forward . The results show that the Tianzishan Complex Rock is composed of granite, diorite and mafic rock,these rocks provide direct heat source and material source for mineralization,deep lithological boundaries are important factor to locate the metallogenic site. Six prospecting areas are delineated , and it is suggested that priority should be given to deep exploration.