In order to reduce the amount of water gushing from the bottom plate in Longquan Mine 4301 working face and protect the bottom plate pressure water, the bottom plate pressure water conservation mining technology based on kilometer directional drilling technology, MWD wireless drilling and logging, high-speed vortex slurry technology and integrated mobile intelligent slurry injection technology was proposed. The gushing water volume was reduced from 140 m3/h to 50 m3/h, and the water quality in the grotto evolved into a dynamic environment with weak top plate hydrostatic environment, which achieved the purpose of bottom-plate bearing water conservation mining, with a reference and guiding significance for Longquan Mine subsequent working face water conservation mining.