The curtain grout technology for flow cut-off, evolved in the process of eliminating danger and its environmental damage caused by ground water, has become an important option for prevention and control of ground water hazards in the exploitation of large water flow deposits in China. On the basis of a review of this aspect in China, a standard for permeation prevention, curtain structure, injection hole drilling, preparation of grout, grout injection system and grout parameters were discussed and constructive suggestions were made. The application conditions of this technology in mine fields were described also in this paper.