The invention mainly relates to a ganoderma anticancer tea and a preparation method thereof. The ganoderma anticancer tea is prepared from the following components in percentage by weight: 30-70% of a traditional Chinese medicine extractive, 1-8% of ganoderma, 1-8% of capillary wormwood herb, 2-10% of American ginseng, 2-10% of chrysanthemum, 2-10% of spina date seeds, 2-10% of dried orange peels and 5-15% of green tea, wherein the traditional Chinese medicine extractive is prepared by using edible alcohol with the mass concentration of 80-90% to extract and concentrate water caltrop shells, atractylodes macrocephala, red root arisaema, salvia miltiorrhiza, pine needles, pericarpium citri reticulatae viriole, coix seeds, red jujubes and liquorice. According to the invention, the traditional Chinese medicine extractive is combined with tea, so that the tea has the functions of removing foul smell, cleaning toxin and fire, warming middle and tonifying deficiency, activating blood circulation and supplying Qi, improving vigor, building a body, regulating functions of a body, and enhancing immunity, can delay cell aging after being drunk for a long time, prevents diseases such as esophageal cancer, stomach cancer, cervical cancer and breast cancer, and is significant in effect.