Crotalaria sessiliflora L. essence is disclosed. The essence includes, by mass, 8-10 parts of benzyl acetate, 8-10 parts of benzyl benzoate, 1-2 parts of benzyl propionate, 1-2 parts of cinnamic alcohol, 18-20 parts of vanillyl alcohol, 1-2 parts of cyclamen aldehyde, 0.5-1 parts of diethyl phthalate, 1-2 parts of eugenol, 7-8 parts of hydroxyvanillin, 0.5-1 part of indole, 8-10 parts of linalool, 5-6 parts of linalyl acetate, 1-2 parts of methyl anthranilate, 0.5-1 part of p-cresyl acetate, 0.5-1 part of phenylacetaldehyde, 8-10 parts of phenethyl alcohol, 1-2 parts of styrallyl acetate, 1-2 parts of first-grade terpineol, 0.5-1 part of cis-jasmone, 1-2 parts of vanillyl butyrate, 1-2 parts of vanillyl formate, 1-2 parts of ethyl geranyl ether, 18-20 parts of hexylcinnamaldehyde, 0.5-1 part of p-cresol, 0.5-1 part of phenylpropyl aldehyde and 3-5 parts of nerol. The essence has fresh and pleasant crotalaria sessiliflora L. fragrance, long duration time, obvious characteristic fragrance, full fragrance and a strong natural sense, can be widely applied in daily chemical products, and can meet ever-growing material and cultural needs of the people.