The invention discloses a method for cultivating cordyceps sinensis sporocarps, a cordyceps sinensis sporocarp composition and an application thereof. The method for cultivating the cordyceps sinensis sporocarps comprises the following steps: screening a dominant strain, wherein the dominant strain can be used for rapidly and stably producing the cordyceps sinensis sporocarps inoculating the dominant strain into an artificial culture medium containing a silkworm chrysalis extracting solution, peptone, a yeast extract, glucose, superfine sand, food-grade carboxymethyl cellulose, trace elements and food-grade agar powder or agarose gel and performing cultivation in an environment with a changeable temperature and LED (Light-Emitting Diode) illumination to fulfill the aims of industrial scale and mass production of the cordyceps sinensis sporocarps. As proved by detection, the cordyceps sinensis sporocarps cultivated by using the method are higher in indicating components such as polysaccharides, cordycepic acid and adenosine than natural cordyceps sinensis sporocarps.