Curtain grouting is one of the most important processes to solve the mining flooding, especially in strong karst areas. Long-term substantial pumped groundwater can easily lead to environmental geological disasters. This paper elaborates the dynamic water grouting technology in strong kart area about the curtain design, drilling technology requirements, grouting materials, length of grouting segment, grouting pressure, slurry concentration, grouting completion standard, treatment of slurry overflowing and the effect test.