A low pressure infuses to grout the technique in floodgate prevent from seep into handle, the technique parameter etc. are introduced. Technique of an exploitation tally up to have the construction in brief, the safety credibility, the investment province, raise the floodgate to prevent from seep into obvious etc. of result, have the higher expansion value. It can be used in the foundation of the big dam, the foundation of the house, the prevent from of foundation and underground building of the road and bridge seeps.