Abstract: With the in-depth study of pit gravity measurement and the introduction and development of micro motion detection technology, a new understanding and orientation of the underground physical exploration technology and methods, excluding the influence of underground electric and magnetic interference, and obtaining positive and effective detection effect in the mineral search work. This paper selects Baiyinuoer Lead-Zinc Mine on the pit gravity and pit micro motion detection technology application research, researchs the known ore body ggravity anomaly characteristics, and ultimately form the method of measurement and processing of the application of the program, summarize and comprehensively assess the effectiveness of the method. The feasibility of the micro motion detection method in detecting unstable geological interfaces in the pit is studied, and the reliability of the method in finding hidden fracture structures related to the ore body is further summarized. By summarizing the advantages and disadvantages of each method in trench surveying, a set of method combination technology application system adapted to production mines is formed.