To obtain a drying method with high retention of 6′-O-caffioylarbutin (CA), 3′-O-caffeoylquinic acid (CGA) and Arbutin (Arb) in ‘Quezui Tea', nine drying methods of hot air drying (HAD), freeze vacuum drying (FVD), vacuum drying (VD), sun drying (SD), microware drying (MD), natural air drying (NAD), boiling and natural air drying (B-NAD), steaming and natural air drying (S-NAD), and quick-boiling and natural air drying (QB-NAD) were used to dry the leaf buds of Vaccinium dunalianum.HPLC was used to establish the content analysis method of three main components.Furthermore, six different pretreatment times were set to optimize the innovative methods S-NAD, QB-NAD, and B-NAD.Results showed that the contents of the three main components obtained by 9 drying methods were CA>CGA>Arb.S-NAD was the drying method with the highest retention of CA and CGA content, up to 428.726 mg/g and 13.213 mg/g respectively.VD was the drying method with the highest retention of Arb content, up to 16.054 mg/g, and S-NAD method could also obtain a higher Arb content (11.815 mg/g).The optimal pretreatment time of the three innovative drying methods was S-NAD steaming for 5 min, QB-NAD scalding for 1 min, and B-NAD boiling for 1 min, respectively.Therefore, the drying method significantly affected the retention content of the three main active components, but the order of the content of the three main active components was not affected by the drying method in ‘Quezui Tea'.To achieve high retention of the three main components of in ‘Quezui Tea' at the same time, S-NAD was the most suitable drying method, and steaming pretreatment for 5 min is the best.
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