Relatively low conversion efficiency is the main limitation for realizing the conversion from CO₂ photoreduction to high-value-added chemicals. Herein, we demonstrate that coupling alternating magnetic field (AMF) can significantly enhance the solar-catalyzed CO₂ conversion process. Utilizing NiO / TiO₂ as the experimental photocatalyst, CO₂ could be reduced into CH₄ with the participation of water vapor. The catalytic system presents a high activity that is improved by ∼200 % toward CH₄ production through integrating with AMF. The applied AMF, on one hand, can increase the density of carries by restraining the combination of photogenerated electron-hole pairs. On the other hand, the applied AMF enhances the oxidizability of the catalysts with simulated solar irradiation to boost the oxidation of H₂O to O₂. Further, our examination illuminates that the Ni species serve as the adsorption/mobilization sites of CO₂ to boost the conversion of CO₂ to CH₄ by photogenerated e ⁻ and the H ⁺ produced by H₂O. This strategy paves a new path for boosting photocatalytic CO₂ conversion by integrating AMF into the reaction.