Abstract:In this paper， the nonlinear chemical fingerprint technology， chromatography， mass spectrometry， enzyme-linked immune， near infrared， chromatography-mass spectrometry technology were used to detect and identify adulteration in food， such as beverages， beer barley， honey， goat milk and cow milk. In contrast， nonlinear chemical fingerprint technology is a kind of new method based on holistic analysis or comprehensive analysis， and it possesses many advantages， such as simple operation， without sample pretreatment， good reproducibility and so on.