Ion beam injection mutation breeding method for cordyceps militaris strains and cordyceps militaris strains bred therethrough

The invention relates to a cordyceps militaris strain preserved in CGMCC on Oct. 22th, 2014, with the preservation number thereof to be CGMCC No. 9818. The invention also provides the application of the above strain in the liquid fermentation and production of cordycepin and cordyceps militaris mycelium and the solid culture and production of cordycepin, and the ion beam injection mutation breeding method for cordyceps militaris strains. The cordyceps militaris strain is excellent in cordycepin production performance, and the cordycepin yield of the above strain is higher than that of an original strain by 8.85 times.