Tanshinone has four mechanisms in treating alopecia: 1, which has the functions of promoting blood circulation, removing blood stasis, promoting scalp blood circulation and promoting hair growth; 2. Adjust the hormone level in the body, inhibit the excessive androgen level, and make the hormone level in the body tend to be balanced; 3. Inhibit Malassezia or Propionibacterium acne in scalp or hair follicle, avoid seborrheic dermatitis or folliculitis, and accelerate hair loss; 4. Inhibit the fibrosis around hair follicles and prevent the irreversible regeneration of hair loss.