The invention discloses a herba rabdosiae rubescentis tea in dome-shaped nuggets and a preparation method thereof, and belongs to the technical field of tea processing technology. The herba rabdosiae rubescentis tea in dome-shaped nuggets comprises the following components: 60-90 parts of herba rabdosiae rubescentis, 5-15 parts of gynostemma pentaphyllum, 5-20 parts of chrysanthemum, and 5-20 parts of grosvenor momordica fruits. The preparation method of the herba rabdosiae rubescentis tea in dome-shaped nuggets comprises the following steps: step 1, material taking; step 2, washing; step 3, stirring; step 4, baking; step 5, tea steaming; step 6, compacting; step7, cooling; step 8, drying; and step 9, packing. The method can effectively reduce the bitter of the herba rabdosiae rubescentis and improve taste. The herba rabdosiae rubescentis tea in dome-shaped nuggets not only has the efficacy of resisting bacteria, diminishing inflammation, clearing heat, detoxifying, eliminating inflammation, alleviating pain, and resisting tumors, but also has the functions of lowering blood lipid, promoting sleep, delaying senescence, resisting cancers, raising immunity, and regulating physiological functions of human bodies. The herba rabdosiae rubescentis tea is shaped into dome-shaped nuggets so as to meet market demands. The method greatly reduces the loss of effective ingredients in the herba rabdosiae rubescentis. The tea accords with tea-drinking habits of people, and facilitates daily health care.