Abstract: Metal nanocluster catalysts prepared by liquid solution chemical reaction usually show excellent catalytic performance. However，the nanoclusters are easily agglomerated，which generally decrease the catalytic performance. Therefore，to stabilize metal nanoclusters against agglomeration is crucial for application. This review summarizes the stabilization methods for metal nanoclusters，such as stabilizations using ligands，surfactants，polymers，ionic liquids or biomasses. The distribution and stabilization effect of support for metal nanoclusters is presented. Furthermore，some opinions about the study of metal nanocluster catalysts are proposed.