Abstract: Field application of Henan oilfield indicated that in polymer injection block before follow-up water flooding and after polymer slug injection , if there is no timely overall depth profile control , channeling and fast fingering will easily happen , resulting in rapidly increased water cut and declined oil production.In V1-10 series of Shuanghe oilfield , the overall profile control technology has been timely applied , which improves the injection profile , effectively prevents the fast further water flood fingering , slows down the production decline and further digs oil increase potential of polymer flooding technology , as well as improves the oil displacement effect , reduces costs and achieves economic production of water flooding remaining oil.Field application of V1-10 formation series in Shuanghe oilfield has proved that the overall profile control technology is not only a simple and passive measure to reduce production concentration and to slow down production decline , but also a kind of effective means of tapping.