The present invention relates to a 
silicone rubber reinforced and cross-linked based on POSS, and a preparation method thereof. According to the concrete preparation method, cyclic 
carbonate containing vinyl and octa polyhedral oligomeric(mercaptopropyl) 
silsesquioxane (SH-POSS) are subjected to a 
thiol-
ene reaction to synthesize cyclic 
carbonate modified POSS as a reinforcing filler, alpha,
omega-aminoalkylpolysiloxane is used as a base glue, and the cyclic 
carbonate group on the POSS and the amino group in the base glue are subjected to a reaction to form a cross-linked curing center so as toprepare the 
room temperature or high temperature 
silicon sulfide rubber. According to the present invention, the problems that the 
inorganic particles are easy to 
agglomerate and the interaction force at the organic / inorganic two-phase interface is weak during the traditional reinforcing can be avoided, the problems caused by the use of the catalyst during the 
vulcanization can be avoided, the 
silicone rubber preparation process is simplified, and the production process and the product have characteristics of safety, energy saving, 
environmental protection, strong practicality and easy promotion, and have great application potential in the fields of 
aerospace, electrical and electronic, light industry, 
chemical industry, 
textile, machinery, building, transportation, national defense, energy sources, 
medicine and 
medical treatment, 
agriculture and the like.