The invention discloses a quick measurement method for coumarin and safrole in essence and flavor. The quick measurement method comprises the steps of performing oscillation extraction on an essence and flavor sample by taking ethyl alcohol aqueous solution as a solvent, filtering an extracting solution through an organic filtering film, and measuring the coumarin and the safrole through ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS / MS). The quick measurement method has the characteristics that difficulties in quantified separation and purification of a complicated mixture system are avoided through quantification by an isotope dilution internal standard method; the ethyl alcohol aqueous solution is used as the sample extraction solvent, so that the extraction efficiency is guaranteed, and the amount of organic impurities, which enter a chromatographic column, in small samples is reduced; furthermore, the chromatographic column is effectively protected; compared with the conventional method, the UPLC-MS / MS is high in analysis speed, high in repetitiveness and high in recycling rate, and is suitable for analysis of a large batch of samples.