Abstract: In the development process of hard recoverable reserves and injection blocks in Gaosheng oilfield, gas and water injection is difficult, steam stimulation and water flooding effect is bad due to deeply buried reservoirs, poor reservoir properties, high clay content, reservoir damage and other factors. The strong penetrated active plugging removal technology has been studied aiming at main problems existed in Gaosheng oilfield for a long time. The application shows that the strong penetrated active plugging removal can effectively release the oil pollution and increase the near wellbore reservoir permeability, decrease steam injection pressure and increase the quantity of gas and water injection, which improve development effect of the block.