PROBLEM TO BE SOLVED: To provide a method of increasing the rate of infection of hosts of Cordyceps sinensis.SOLUTION: The method increases the rate of infection of hosts of Cordyceps sinensis by creating wounds on the surface of bat moth larvae, which are a host of the Cordyceps sinensis, by an energy beam such as a laser, and spraying, coating or impregnating the surface of the bat moth larvae with China Hirsutella bacteria liquid.SELECTED DRAWING: Figure 1