High-efficiency oilfield water plugging agent (PAM), using polyacrylamide as the main ingredient, is suitable for "breakthrough" and "unblocked" phenomena in oilfield exploitation. It can effectively reduce the development effect of the oilfield, timely plug high permeability layers and high water production layers, and adjust the flow profile. This product has different charge types (anionic, cationic, non-ionic and amphoteric), which can be adjusted according to the specific situation to optimize the output ratio. When used, PAM can be used independently, or it can be cross-linked with aluminum, chromium salts or zirconium salts to form a gel, or combined with certain resins to become a high-temperature resistant interpenetrating network polymer. It has different effects on the filtration capacity of oil and water, reduces water production, and has little effect on oil. The product appearance is white granular powder, with a molecular weight of 6-30 million, a hydrolysis degree between 0-35%, a dissolution time of no more than 1 hour, and a solid content of more than 88%, which fully meets the needs of industrial water treatment. It has passed ISO, S9001, SO14001, OHSAS and other certifications to ensure that the product is professional, efficient and environmentally friendly.