Abstract: Plugging on string inner wall in perforation interval is one of the main causes leading to insufficient water injection in Shuanghe oilfield. Acid treatment is used typically to remove these plugging, however, large amount of investment is needed and the validity period is short.A new scraping and washing method is proposed for use based on production practice in this paper. The amount of investment needed is small, field operation is simple and stimulation effect of injection well is good.