The invention discloses a paper pulp bleaching compound enzyme and a preparation method thereof. Through scientific compounding of high temperature-resistant alkaline xylanase as a main raw material and bacillus thermophilus culture, laccase and its medium, glucanase, EDTA, a protective agent, an activator, seminase, lipase, tannase, pectase, a whiteness stabilizing agent, a nonionic surfactant and an anti-oxidant, the paper pulp bleaching compound enzyme is prepared. The paper pulp bleaching compound enzyme completely retains paper pulp cellulose, maximally dissolves and degrades lignin, has the advantages of complete enzyme system, good bleaching effects, storage easiness and good storage stability, can substantially improve a yield and quality of paper pulp of broad leaf wood, needlebush and reed yellow waste slurry, respectively improves whiteness by 8.18%, 8.13% and 8.23%, respectively reduces a yellow index by 38.35%, 35.82% and 31.76%, saves a conventional chemical article use mount by 50-60%, reduces a cost and protects the environment.