In the process of oil field production, the water in the reservoir through and”channeling” phenomenon reduces the effect of oilfield development, the need for timely water shutoff, The plugging essence is to plug the high permeability layer and the high-yield water layer, adjusting the flow profile reduce water production, and enhance the recovery rato As plugging agent polyacrylamide has different impacts on filtration abilities of oi and water. less on oil and more on water. In application it can be used without cross Hinking or cross-inked to gel in combination with aluminum, chromic so ts ox zirconium salts etc or added some resins to become an interpenetrating polymer network [IPN] with higher temperature resistance, IPN plugging ogent cross-Inked by wjO style PAM katex and modified amino resin has already been widely applied in ol field plugging and gotten obvious effects. PAM can be used in adjusting injection profiles and blocking BA holes, too, and shows promising effects in practice