Abstract: Leimengou molybdenum ore belongs to the breccia type molybdenum deposit,its occurrence,from inside to outside for breccia molybdenum ore-breccia-normal rock,ore body boundary is not clear,the surface is not exposed.Breccia and rock resistivity difference is apparent,geophysical prospecting method in the region has a physical property.Transient electromagnetic method in the area of application,obtained better result,established the geological geophysical model for rational arrangement of exploration engineering,provides the basis for molybdenum.This paper introduces the transient electromagnetic method based on the principle of thunder,molybdenum ore exploration as an example,the focus of the technique data processing,data interpretation,application effect and some technical problems in some analysis author.