Abstract: The research on friction reducer started earlier abroad, and some experiences can be taken by us for reference. Here in the article is introduced some experience formulas and calculation processes concerned in the light of which computersare used in the United States to calculate the properties of the friction reducer, a preliminary study of the monofacior calcultion formulas for home-made ZDR friction reducer. and some explanations to their pracrical application in selection and comparison of various output increasing projects.