According to the engineering of curtain grouting for water control in Yuexing copper polymetallic deposit of Jiangxi, the paper described the selection of treatment methods and the treatment process, the grouting construction technology was studied and promoted; briefly introduced some common problems in construction process with countermeasures. Based on the restricting conditions such as engineering geological conditions, engineering properties and the budget, high-pressure hole with internal circulation grouting and downward stage grouting were selected. The grouting material were cement fly-ash and cement clay grout, water glass grout could be added while necessary. The engineering quality was determined by drilling coring, water pressure test and surface wave detection.