The invention discloses a method for detecting alkaline colorants in livestock meat products. The method for detecting the alkaline colorants in the livestock meat products comprises the steps that extraction of samples to be detected is carried out by using an extraction solution, a liquid supernatant obtained after extraction is purified by a WCX solid-phase extraction column to complete samplepretreatment, and then, the detection method for simultaneously screening and confirming the seven alkaline colorants in the livestock meat products is established by using an ultra-high efficient liquid chromatography-series connection quadrupole rod linear ion trap mass spectrometer. The method for detecting the alkaline colorants in the livestock meat products has the characteristics of simpleoperation, efficient flux, qualitative accuracy, high sensitivity, friendly environment and the like, is suitable for screening and confirming the various alkaline colorants in the meat products, andavoids detection of false positive samples.