The invention discloses a method for preparing cyclic carbonate with a nickel-based catalyst. Carbon dioxide and an epoxide are taken as raw materials, a conjugated nickel porphyrin dipyridyl/conjugated nickel porphyrin dipyrrole microporous polymer material is taken as a multi-phase catalyst, tetra-n-butyl ammonium bromide is taken as a promoter, and efficient and green catalytic synthesis of cyclic carbonate is realized in the absence of a solvent at the normal temperature and under the normal pressure. The method has the main advantages that the catalyst is simple to prepare, low in cost, high in catalytic activity, stable in structure performance, easy to recycle and recyclable; the method adopts mild reaction conditions and is high in rate, safe to operate and applicable to large-scale industrial production.