The invention provides a composite vaccine adjuvant, which is comprised of sodium ferulate and zinc hydroxide in a mass ratio of 10:1˜50:1. When the composite vaccine adjuvant and vaccine used in combination, the humoral immunity response is enhanced effectively, the enhanced effects is similar with aluminum adjuvant, superior to single sodium ferulate adjuvant and single zinc hydroxide adjuvant. It is not only atoxic, safety, but also reliable in the range of immune dose. The composite vaccine adjuvant with easily obtained and commercially available raw materials, is low cost, stable performance and simple preparation technology, which can be used as an adjuvant of hepatitis B vaccine, gene-engineered vaccine, virus vaccine and so on.
