For the application of directional drilling in solid mineral exploration, it is technically intended to control borehole trajectory to make the inclination of the borehole or the intersection point of the borehole to meet the geological exploration requirements; and economically is desired to expose the deposit and its boundary for accurate definition of ore reserves. The successful solid mineral exploration was made in J14ZK0100 with branch hole in Jinchang mine in Dongning of Helongjiang Province, the drilling works was greatly saved and valuable experience was accumulated. On the basis of the analysis on the difficulties in directional drilling construction, the paper introduces the technical measures and construction effects.