Abstract: The CaCO₃ scaling is the main scaling type of water injection wells, which seriously affects oilfield development effectiveness. At present, the key parameter is gained through a special plate to predict CaCO₃ scaling tendency and amount, which makes calculation of scaling prediction method complicated. By means of scaling mechanism analysis and experiment parameters, multiple regression matching method is used to match the curves of the special plate and calculation program is completed. The calculation program can simplify scaling prediction calculation and analyze sensitivity factors of scaling. The method is proved correct, and provides reference to control injection water quality.