The invention provides a method of full-artificial culturing Cordyceps sinensis, including sampling, strain separating, host insect collecting, breeding and feeding, infecting and continuing feeding, on artificial condition, largely culturing Hirsutella sinensis; feeding host insects in an scale room at low altitude, completing the infection of Hirsutella sinensis to the host insects and sexuality of Cordyceps sinensis. By artificial culture, the host grubs are big and good-quality, and the success rate of infection is high, the infection time is short, the quality is stable and controllable, and the pesticide effect test fully indicates that the pesticide effect of the produced Cordyceps sinensis is equivalent to that of the natural Cordyceps sinensis and it can overcomes the disadvantages of long growing time of natural Cordyceps sinensis and low natural infection ratio, and implements the industrialized production of Cordyceps sinensis.