Objective: To further study the effect mechanism of Maxing Shigan Decoction in against influenza virus.Methods: ①Use nasal inoculation to establish mouse pulmonary infection model animals by influenza virus.Set up normal control group,model control group,Oseltamivir group and Maxing Shigan Decoction(MXSGD) group.After 7 days of drug or normal saline gavages,observing the lung index and pathological changes of lung tissue.②Using 2-(4-methylumbellifery1)-α-D-Nacetylneuraminic acid as a substrate,detecting the influenza virus neuraminidas...