At this time, the special defoamer for paper making is a solution product for foam generation during paper making. It can effectively remove all foam on the surface during pulping without affecting the quality of paper. Paper specific defoamers are composed of various organic hydroxyl compounds, enhancers, fatty acid ether lipids, and other substances. They have strong defoaming and anti foaming functions, do not contain mineral hydrocarbons, are environmentally friendly, and have good compatibility with foaming media; The effect is stable during the storage period.