The invention relates to a burdock / coptis root / immature bitter orange tea. Burdock, coptis root and immature bitter orange are used as main materials; and Herba Patriniae, Morinda officinalis, Herba Belladonnae, Pinellia tuberifera, purple loosestrife and clove are used as auxiliary materials. The preparation method comprises the following steps: cleaning the main materials and auxiliary materials, respectively decocting, carrying out microwave extraction, mixing the main material extracting solution and auxiliary material extracting solution obtained by extraction, concentrating, carrying out vacuum freeze drying on the obtained concentrated solution, pulverizing into ultrafine powder, sterilizing, and packaging into bags, thereby obtaining the finished product. The burdock / coptis root / immature bitter orange tea and preparation method thereof solve the problems of lower technical content, single processing technique, single component and high price in the health-care tea in the prior art. The burdock / coptis root / immature bitter orange tea is prepared from multiple selected traditional Chinese medicines according to the experiences of concentrate on studies of the inventor on the basis of the patrimonial secret prescription, and has the favorable effects of clearing away heat, purging pathogenic fire, removing heat from the blood and removing toxic substances.