Abstract: Recent studies on the determination of natural polyphenols by spectrophotometric analysis are introduced. The methods of the determination of natural polyphenols are classified by chemical reactions. The applications of the determination of natural polyphenols by spectrophotometric analysis are reviewed. The principles of the determination are discussed,for example, the complex reaction, the oxidated and reductive reaction, the nucleophilic addition reaction and the diazonium-coupled reaction. Some problems are presented. The future main research directions are suggested.

Key words: natural polyphenols, spetrophotometry, determination