The invention discloses a method for utilizing ganoderma lucidum to convert grape skin to produce a functional food and relates to the technical field of bioengineering. According to the preparation method, sequentially through the steps of enlarged culture in a test tube, liquid shake-flask culture and enlarged culture in a seed tank, solid fermental cultivation, drying and smashing, the functional food which regulates blood lipids, blood sugar and blood pressure, resists radiation and inhibits tumor is obtained. According to the method, the grape skin, rice, wheat, corn and sorghum and the like are taken as solid substrates, ganoderma lucidum is taken as a strain to convert a grape skin flavone, and ganodenic acid and ganoderma lucidum polysaccharide; in the obtained product, the content of the flavone is 2-50 mg/g of dry substrate, the content of the ganoderma lucidum polysaccharide is 10-100 mg/g of dry substrate, the content of ganodenic acid is 1-20 mg/g of dry substrate, and the method can be used for extracting active ingredients flavones, ganoderma lucidum polysaccharide and ganodenic acid of ganoderma lucidum and producing tablets or capsules for treating the blood lipids, blood sugar and blood pressure, resisting radiation and inhibiting tumor.