In the quantum dot surface coated silica shell can effectively protect the nanoparticles nuclear from affected by the external environment,which makes it have a broad application prospect in the field of optoelectronic devices and biomarkers. Through one-pot process to prepared high quality CdS:Mn/ZnS quantum dots,then the method of inverse microemulsion can be used to continue coated SiO2 layer in the surface of the quantum dots to get multi-lay⁃er core-shell structure CdS:Mn/ZnS@SiO2 quantum dot material. Chemical stability of ZnS and SiO2 reduces the side effects of CdS quantum dots material and improves its stability,However,CdS:Mn/ZnS quantum dots still main⁃tain most of its performance after coatting,so CdS:Mn/ZnS@SiO2 quantum dots have great potential applications in optical applications.%在量子点表面包覆二氧化硅壳层，能够有效的保护纳米粒子核不受外界环境的影响，使得它在光电子器件和生物标记等领域中有着广泛的应用前景。通过一锅法制备高质量CdS：Mn/ZnS量子点，然后利用反相微乳液方法在量子点的表面继续包覆SiO2层，得到CdS：Mn/ZnS@SiO2多层核壳结构量子点材料。化学性质稳定的ZnS及SiO2材料的包覆使CdS量子点材料的毒副作用降低并有效提高其稳定性，然而CdS：Mn/ZnS量子点的大部分性能在包覆SiO2后都保持不变，因此CdS：Mn/ZnS@SiO2量子点在光学应用中有很大的应用潜力。
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