The invention discloses plant essence with a hair blacking effect and relates to the technical field of daily chemical industry. The essence is prepared from the following raw materials in percentageby weight: 0.3%-1% of traditional Chinese medicine extracts, 0.02%-0.08% of preservative and the balance of vinasse hydrolysate containing 0.4%-1% of amino acid nitrogen. The added traditional Chinesemedicine components are prepared from radix angelicae sinensis, rhizome Chuanxiong, radix angelicae, mulberries, saffron and Chinese arborvitae twigs and leaves, all traditional Chinese medicine components are respectively extracted according to specific extraction processes, and the traditional Chinese medicine extracts are mixed according to specific proportions, so that the essence has an obvious hair blacking effect. The vinasse hydrolysate contains polypeptides capable of nourishing hair follicles and improving micro-circulation. Six traditional Chinese medicines can be used for health-care food or food, the vinasse is obtained by rice fermentation, and the product formula is safe and effective and does not have toxic and side effects. Tests show that after people having gray hair with no obvious pathogens in the 35-55 age group in China use hair blacking essence disclosed by the invention for three months, the regenerated hair is black.