With analysis of the existing drilling information of Hole ZK1403 in Henan Banchang Mining Area, a deviation correction plan was determined according to the geological requirements of directional deviation correction. An effective directional deviation correction process with the slim hole mud motor was developed in terms of deviation correction drilling theory with the slim hole mud motor, drilling equipment, instruments, drilling procedure and drilling parameters. Successful deviation correction was achieved from the hole depth 958m, inclination 10° and azimuth 143° to the hole depth 1100m, inclination 7° and azimuth 18°. Based on the correction results in the mining area, both the advantages and disadvantages of the process were summarized, providing reference for deviation correction in deep geological hole drilling.