Production of the commercial chemical of propylene carbonate (PC) via cycloaddition of the sequestered carbon dioxide would dramatically reduce the carbon footprint. However, industrially conventional CO2 catalytic conversion processes suffer from energy-intensive and lengthy purification operations. Herein, we report the catalytic membrane reactor (CMR) that integrates catalytic reaction and pervaporation functions into a single unit, where the products were transferred in situ to the permeate side. The morphology, structure and ingredients of the composite three-layer structure were characterized by SEM, EDS and XRD, and the effects of ionic liquid loading, temperature and propylene oxide (PO) flow rate on PO conversion and PO flux in CMR were evaluated in detail. Under optimized conditions, the PO conversion and PC selectivity of the continuous process were both close to 100%, with suitable PO flux of 16.506 mol/m2·h. This work offers a feasible process for developing an ionic liquid membrane reactor to produce PC.