The invention discloses a profile control-unplugging combining technique for a water injection well. The profile control-unplugging combining technique comprises the steps that (1), well input fluid is prepared; (2), pressure is gradually increased, water is injected into a stratum, a relation curve of injection pressure and displacement is drawn, and an injection pressure curve knee P* is determined; (3), a cellulose plugging agent A is injected at the injection pressure smaller than P* and used for remote well profile control; (4), a profile control agent B forming glue through acid catalysis is injected at the injection pressure smaller than P*; (5), displacement fluid is injected; (6), well shutting for waiting on cement setting is carried out for 2-6 hours; (7), acid liquor C is injected at the injection pressure larger than P*; (8), pressure release is carried out; (9), normal water injection is restored, and if normal water injection can be achieved, construction is completed. According to the profile control-unplugging combining technique for the water injection well, water reducing oil increase of a high water content oil well is achieved, profile control and unplugging ofthe multilayer oil deposit water injection well are achieved, an injection profile is improved, and the oilfield development effect is improved; and construction operation of the water injection wellis easy, convenient, safe and efficient, and wide market application prospects are achieved.