The invention relates to a hair dye, in particular to a natural hair dye prepared by using
phytochrome curcumin and a hair
dyeing method of the natural hair dye. The hair dye comprises an agent A and an agent B, and is characterized in that: the agent A contains 0.1 to 10 weight percent of
curcumin, 20 to 50 weight percent of
polyol, 1 to 5 weight percent of
thickening agent, 1 to 10 weight percent of surfactant and the balance of water, and the pH value is regulated to be 3 to 7; and the agent B contains 1 to 10 weight percent of
metal ion mordant, 1 to 5 weight percent of
thickening agent, 1 to 10 weight percent of surfactant, 0.1 to 0.3 weight percent of natural essence and the balance of water, and the pH value is regulated to be 3 to 7. The hair
dyeing method comprises the following steps of: uniformly spreading the agent A on the hair when the hair is dyed, and
dyeing the hair for 10 to 40min at the temperature of between normal temperature and 60 DEG C; and uniformly spreading the agent B on the hair, mordanting for 10 to 20min, cleaning the hair and blow-
drying. The
curcumin has a good dyeing effect and also has the effects of resisting
bacteria and protecting
skin. Reagents which are toxic to human bodies are not used in the hair dye, and substances which are toxic to the human bodies are also not generated in the hair dyeing process, so the hair dye is high in safety. The adopted curcumin is insoluble in water and cannot fall off easily in the washing process, so the hair dye has a good dyeing effect, and the color of the dyed hair can be kept for a long time.