Abstract: The quality of 32 components, such as p-benzenediamine, in hair dye cosmetics were examined, 50 batches of hair dye cosmetics sampled from 27 cities, counties in Gansu province were examined by high performance liquid chromatography(HPLC). Results showed that the frequency of use of 4 components is fairly high in the 50 batches of hair dye cosmetics and the failure rate of the 50 batches of hair dye cosmetics was 50%. Even if the prescribed limit was not exceeded, 22 batches were of problematic samples, in 2 batches banned components were detected, in 1 batch, phenylmethylpyrazolinone exceeded the prescribed limit. The package labeling of hair dye cosmetics should be standardized, and the consistency between the formula information of approval parts and the label logo of packaging should be strengthened.