Natural hair dye prepared from fructus chebulae pigment and dyeing method thereof

The invention discloses natural hair dye prepared from fructus chebulae pigment and a dyeing method thereof. The natural hair dye comprises an agent A and an agent B; the agent A is prepared from, by mass, 1-10% of fructus chebulae pigment, 2-8% of thickener, 1-5% of surfactant, 1-5% of dyeing accelerant and the balance water, and the pH value is adjusted to be 3-6; the agent B is prepared from, by mass, 1-10% of water-soluble metal salt, 2-8% of thickener, 1-5% of surfactant and the balance water, and the pH value is adjusted to be 3-6. The dyeing accelerant added in the agent A can promote swelling of the hair scale layer and is beneficial for the fructus chebulae pigment diffusing into hair, after the agent B is used, the durable hair dyeing effect can be achieved, and different colors are obtained after hair dyeing by using different water-soluble metal salts in the agent B. The fructus chebulae pigment has the advantages of being nontoxic, harmless and non-carcinogenic and not causing allergy to the skin