The invention discloses tea bran anti-dandruff itching-relieving shampoo and a preparation method thereof. The shampoo is mainly prepared from the following raw materials in parts by weight: 10 to 50parts of tea bran, 2 to 10 parts of Chinese honeylocust fruit, 1 to 6 parts of radix polygoni multiflori, 1 to 20 parts of a thickening agent, 6 to 26 parts of a foaming agent, 0.02 to 0.12 part of anitching relieving agent, 0.2 to 1.5 parts of nutritional ingredients, 0.03 to 0.15 part of hyaluronic acid, 0.2 to 1.6 parts of citric acid, 0.02 to 1 part of edible oil, 0.02 to 0.6 part of essenceand 100 to 120 parts of water. Mulberry leaves adopted by the invention have better effects of dispelling wind and heat, clearing the lung and moistening dryness, and clearing the liver and improvingeyesight, cortex dictamni has better effects of clearing heat and drying dampness, and dispelling wind and removing toxicity, fructus viticis has better effects of dispelling wind and heat, clearing head and eyes and dehumidifying joints, cacumen biotae can better prevent blood-heat alopecia and premature graying of hair, the tea bran contains tea saponin, protein, natural tea oil and the like, and the shampoo has the effects of stopping dandruff, relieving itching, removing oil, realizing sterilization and repairing damaged hair after being used for a long time, and is beneficial to use.