<p>The novel hypercross-linked porous ionic polymers combine the advantages of ionic liquids, hydrogen-bond donors and hypercross-linked polymers. In this regard, imidazolium-based ionic liquids with different hydrogen-bond donors (hydroxyl and carboxyl groups) were grafted on hypercross-linked polymers by taking advantage of the easier functionalization of ionic liquids. With the introduction of ionic liquids, the CO₂ adsorption capacity of HCP-CH₂IL-COOH was increased to 13.86 wt % (273 K, 1 bar). The catalytic performance of HCP-CH₂IL-OH and HCP-CH₂IL-COOH with containing hydrogen-bond donors was found better than that of HCP-CH₂IL-Et without hydrogen-bond donor. In addition, HCP-CH₂IL-OH showed the highest CO₂ conversion efficiency after 48 h with a high yield (up to 94%) at room temperature and pressure due to high specific surface area, high CO₂ adsorption capacity and the catalytic activity of ionic liquid, which achieved efficient CO₂ conversion by metal-free catalytic system under mild conditions. The TON and TOF values were found to be up to 292 and 6 h⁻¹, and the efficiency was comparable to that of the current metal-free heterogeneous catalytic systems. In addition, the catalyst can efficiently convert different terminal epoxides and show good universality. More interestingly, the catalytic activity of this catalyst was retained after five cycles, which endorse its recycling stability.</p>