Pyrrolidinyl diaminopyrimidine oxide can significantly improve the proliferation ability of dermal papilla cells (P 0.05), significantly promote the secretion of type III collagen (P 0.05), promote hair growth, increase the number of hair follicles and the thickness of the dermis. Pyrrolidinyl diaminopyrimidine oxide Aminopyrimidine oxide has the effect of promoting hair growth and has good application prospects in the field of hair growth products.