The exploration work for the Gaodi Manganese Mine in Songtao County， Guizhou has fully entered the exploration stage， with an exploration network distance of 200m×300m， with very strict requirements for drilling quality： the deviation of the final hole target point shall not exceed one fourth of the exploration network distance， that is， the parallel exploration line direction shall not exceed 50m， and the vertical exploration line direction shall not exceed 75m. For deep holes with a design depth of over 1400m （the deepest borehole reaches 1950m） in the exploration area， this requirement far exceeds the requirements of geological core drilling regulations. According to many years of deep hole construction experience， the construction units under Bureau of Geology and Mineral Exploration and Development Guizhou Province have taken technical measures to maintain straight and prevent deviation from the aspects of rig base construction， drilling structure and combinatorial optimization of drilling tools， drilling parameter adjustment， and single reamer deviation correction， and achieved good results.