Disclosed i s a method for cultivating cordyceps indoors, comprising an egg stage, a larva-rearing stage and a cordyceps-harvesting stage. The technical key lies in that, during the whole larva-rearing stage or after stage 2 to 4 , each single larva is cultivated in isolation and during the larva-rearing stage, strains are infected with any one of ascospores, conidia and mycoderma of cordyceps or a mixed strain material thereof. The method solves the problem of contaminated larvae killing each other and infecting each other with diseases during growth and development by controlling the air cleanliness, temperature and humidity conditions in doors and cultivating each single contaminated larva in isolation. The method does not require placing the contaminated larvae in the wild, and interference :from an external environment is small during the entire cordyceps rearing stage. The spore germination stage of cordyceps in the method is performed in a cordyceps culturing plate, and temperature control, humidity control and the like can all be performed under artificial conditions, which i s suitable for large-scale production.
