Abstract:In order to improve the quality of the dry jujube，four different drying technology （section hot air drying，freeze drying，medium-wave infrared drying，microwave-hot-air combined drying）used in the jujube dried.The types and contents of flavan-3-ols and flavonol in jujube under different drying conditions were studied by liquid chromatography-mass spectrometry of jujube fruit ，total phenol，flavonoids content and antioxidant capacity in jujube was comparison.The results showed that 7 flavane-3-alcohols（2 proanthocyanidin monomers，1 proanthocyanidin dimer，2 proanthocyanidin trimer，2 proanthocyanidin tetramers）and 2 flavonols（7 quercetin derivatives and 1 kaempferol derivative）were identified in dried jujube fruit.Moreover，the contents of four flavane-3-alcohols and one flavonol（quercetin derivative）in jujube was significantly increased after the fruit was dried by medium-short-wave infrared drying，and the content of total phenols and total flavonoids in jujube was higher，which showed that medium-wave infrared drying was an excellent drying method for jujube.