For problems of low positioning accuracy of electromagnetic wave ranging positioning method due to underground electromagnetic interference and continuous measurement and storage of massive offline data in offline construction of fingerprint feature database by fingerprint positioning method, a region discretization mine target positioning method based on compressed sensing was proposed. Firstly, positioning area is divided into grids for discretization, and fingerprint feature database is constructed by offline measuring signal strength at the grid. Then, sparse position matrix containing target position information is obtained by compressed sensing with a small amount of signal strength sampled online, so as to estimate possible position of the target. Finally, the target is accurately positioned by grid centroid method. The experimental results show that the method achieves accurate positioning of mine target with higher positioning accuracy and less positioning time.