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Construction of metal-organic-frameworks-based composite photocatalysts has attracted much atten-tion for the reasonable band gap and high surface areas to improve the photocatalytic activity.In this study,the ternary heterojunction Pd@UiO-66-NH2@Znln2S4 nanocomposites were facilely prepared for the first time by a two-step method.The visible-light-promoted hydrogen production rate of 0.3％ Pd@UiO-66-NH2@Znln2S4 reaches up to 5.26 mmol g-1 h-1,which is evidently much higher than pure UiO-66-NH2,ZnIn2S4 and binary UiO-66-NH2/ZnIn2S4 composites.Such a huge improvement in the pho-tocatalytic performance is mainly attributed to the matched band gap of ZnIn2S4 and UiO-66-NH2,and the introduction of Pd NPs into photocatalysts that broaden spectral response range and promote the photon induced charge carrier separation.This work may provide a feasible approach for the design and construction of metal-organic-frameworks-based photocatalytic materials.