The invention relates to a hair dye and particularly relates to a natural durable hair dye prepared from
iridoid and
amino acid and a hair
dyeing method. The hair dye provided by the invention contains an agent A, an agent B and an agent C, wherein the agent A contains 8-12% of
amino acid, 1.0-5.0% of
thickening agent, 0.5-1% of
vitamin C and the balance of water, and the pH value of the agent A is adjusted to 8-10; the agent B contains 2-5% of
iridoid, 1.0-5.0% of
thickening agent, 2-4% of
phenethyl alcohol and the balance of water; the agent C contains 3-12% of
hydrogen peroxide, 1-5% of
thickening agent and the balance of water. The hair
dyeing method comprises the steps of firstly, discoloring hair, and then, washing and
drying; then, uniformly
coating the agent A on the hair, and keeping at the temperature of 30-35 DEG C for 15-25min; next, uniformly
coating the agent B on the hair, and keeping at the temperature of 30-35 DEG C for 15-25min; finally, uniformly
coating the agent C on the hair, keeping at the temperature of 30-35 DEG C for 20-25min, washing and
drying the hair. No substances capable of generating
toxicity to human bodies are generated in preparation and application processes of the hair dye; the hair dye is good in safety, capable of
dyeing the air into various colors such as black, red, yellow,
purplish red and the like, plentiful in dyed colors and favorable in fastness.