For　a　wide　range　of　reinforcement　and　high　rates　of　water　plugging,　full-face　curtain　grouting　technology　is　one　of　the　major　measures　to　improve　soft　surroundings　and　seal　high-pressure　water,　especially　to　excavate　underwater　tunnels　that　lack　a　complex　stratum　owing　to　a　large　amount　of　groundwater.　Because　of　high　pressure,　large　quantities,　and　long　cycles　of　injection,　full-face　curtain　grouting　technology　has　a　great　effect　on　tunnel　excavation.　This　paper　discusses　the　control　action　of　full-face　curtain　grouting　technology　on　deformation　of　a　tunnel　and　recommends　sensible　preventive　action.　©　2014　American　Society　of　Civil　Engineers.