Abstract: Noble metal nanocomposites have many special physical and chemical properties, special structure and interaction with other material components, and have great application prospects in many fields, and become a research hot pot. The template method, chemical reduction method, microemulsion method, seed growth method, solvothermal method and high temperature thermal decomposition method for preparing noble metals nanocomposites were reviewed. The advantages and disadvantages of different preparation methods were analyzed, its applications in biomedical, sensing detection and catalysis were introduced, its applications in biomedical, sensing detection and catalysis were introduced, and the preparation process of noble metal nanocomposites was prospected.