The invention relates to a preparation method of a difunctional mesoporous 
silicon ball composite 
targeted drug delivery system, and belongs to the field of nanobiomedicine. The method comprises the steps that a 
coprecipitation method is adopted for preparing superpara 
magnetism Fe3O4 nanoparticles, then, hexadecyl trimethyl 
ammonium bromide is used as a template, a 
photosensitizer is doped, accordingly, the surfaces of the 
magnetic nanoparticles and the 
photosensitizer are wrapped by a layer of 
mesoporous silica, covalent linkage and physical absorption of anti-
cancer medicine are achieved, finally, 
surface modification is carried out through 
folic acid and 
hyaluronic acid, and the difunctional mesoporous 
silicon ball composite 
targeted drug delivery system is obtained. According to the 
system, multiple effects of nuclear 
magnetism radiography, 
fluorescence imaging, 
magnetic hyperthermia, photoactive therapy and 
chemotherapy are integrated, diagnosis and treatment are integrated, magnetic targeting and FA / HA dual 
receptor-mediated targeting effect can more effectively enhance the targeting combination of the 
medicine and 
tumor cells, the effective concentration of the 
medicine in the tumor parts is improved, effect enhancement and 
toxicity reduction are achieved, the killability for the 
cancer cells is enhanced through dual 
drug loading, and the 
treatment effect on tumors is remarkably improved. The product obtained through the preparation method has a quite large application prospect in the field of medicine 
control release.