The invention provides application of a traditional Chinese medicine composition in preparation of a blood fat reducing medicine. The medicine is prepared from the following raw materials in parts byweight: 6-36 parts of wild jujube, 6-36 parts of mulberry, 2-12 parts of lucid ganoderma, 1-6 parts of lily, 2-12 parts of hawthorn, 1-6 parts of poria cocos, 1-6 parts of pericarpium citri reticulatae, 2-12 parts of chrysanthemum and 1-6 parts of lotus leaf. The traditional Chinese medicine composition has a good effect on reducing blood fat. The traditional Chinese medicine composition is reasonable in compatibility, simple and feasible, is a pure traditional Chinese medicine preparation, is small in adverse reaction and can be used by patients for a long time.