The invention discloses a multiphase catalytic synthetic method for preparing cyclic carbonate by additional reaction of carbon dioxide and epoxy compound. The cyclic carbonate can be prepared at a high selectivity of up to more than 87% at 100-180 DEG C under the initial pressure of carbon dioxide of 0.1-6 MPa in the presence of metal composite oxide as the catalyst which is made by calcining Zn-M-Al hydrotalcite, wherein M is alkali earth metal, and organic tertiary amine is solvent and co-catalyst. The catalyst has simple preparation, good stability, no halogen, and repeated utilization.