Selective hydrogenation of alpha,beta-unsaturated aldehydes under mild conditions is a great challenge in the synthesis of the corresponding alcohols. Herein, we report that a series of oxygen vacancy enriched MgAl-LDH coordinated transition metal hydroxide M(OH)(x) (M = Ru, Pt, Pd, Ag, Rh, Fe, Co, Ni and Cu) photocatalysts were successfully prepared taking advantage of the "memory effect" of MgAl-LDH. A high yield of alpha,beta-unsaturated alcohols was achieved under visible light irradiation. DFT simulations and DRIFTS results show that oxygen vacancies facilitate the adsorption of -C=O groups and hinder the adsorption of -C=O groups in cinnamaldehyde, which ensures the high selectivity to cinnamyl alcohol. The highly dispersed and electron-rich transition metal hydroxides facilitated the activation of isopropanol to provide active H species under light irradiation and then enhanced the photocatalytic performance. This study demonstrated oxygen vacancy enriched MgAl-LDH supported transition metal hydroxide M(OH)(x) photocatalysts for efficient selective hydrogenation under visible light irradiation.