A chromatographic column （250 mm × 4.6 mm， 5 μm） with octadecylsilane - bonded silica gel as the filler was used， with methanol and a volume fraction of 1% phosphoric acid aqueous solution as the mobile phase， to establish a method for determining the mass fraction of arbutin in tea using high - performance liquid chromatography （HPLC）. The method demonstrates a good linear relationship within the mass concentration range of 0.349 to 402.788 μg/mL， with satisfactory precision， stability， and repeatability. Furthermore， the extraction method for arbutin in tea was optimized with respect to extraction procedures and solvents. This method not only provides a reliable analytical technique for determining the mass fraction of arbutin in tea but also offers new insights for detecting active ingredients in tea and other plant - based products.