Based on hydrogeological condition of coal pillar mining in Xiaoshimen North Wing Area of Shijiazhuang Ruifeng Coal Industry Corporation, rational water control technology scheme was designed. Comprehensive prevention and control of water treatment were carried out on floor of mining area and adjacent water outlet faults through physical prospecting and grouting. The result showed that reinforcement effect of grouting in floor of mining area was better, and coal pillar resources could be safely exploited.