Abstract: through optimization of waterproof and drainage design at 3₂12 working face in Qianyingzi coal mine and the analysis of safety mining verified,it is got that coal mine should adhere to the geophysical first in preventing and treating of sandstone fissure water harm of coal seam roof and floor.At the same time,it should construct drain roadway and ring sump based on site conditions to realize the gravity flow and concentrated drainage,and to improve drainage and disaster resilience,which provides economically viable solution for targeted exploration and discharge of the sandstone crevice water and optimization design of drainage systems.