With CTAB as template, the β/MCM-41 micro-mesoporous composite molecular sieve has been synthesized by self-assembly of the zeolite structure fragments and the structural units obtained by alkali-treated β zeolite, and the effects of the alkali solution concentration, CTAB dosage in the synthesis process of β/MCM-41 was investigated. The β/MCM-41 composite molecular sieve with well long-range order can be synthesized under the optimum conditions: The solution concentration of NaOH is 1.5 mol/L and the mass fraction of CTAB is 10%. Then the Ce- β/MCM-41 composite molecular sieve doped skeleton with rare earth metal Ce was synthesized and the effect of Ce doping amount (Ce/ β=0.03, 0.08) on Ce- β/MCM-41 was investigated. The result shows that the 0.03-Ce- β/MCM-41 had a well long-range order. The effect of acetylation reaction conditions on the yield of p-MOAP was investigated by using 0.03-Ce- β/MCM-41 as a catalyst in a fixed bed. The single-factor experiments showes that the 4.0 h p-MOAP yield is 58.6% under the conditions: The velocity of the reactants flow is 65 mL/h, the LHSV is 6.5 h ^-1, reaction temperature is 140 ℃ and n(AN)/n(AA)=6.0.