The invention relates to an antiviral influenza drug and a preparation method of the antiviral influenza drug. The drug comprises the following ingredient by weight: 8-12 parts of ephedra, 8-12 parts of cassia twig, 5-7 parts of processed licorice root, 8-12 parts of semen armeniacae amarae, 8-12 parts of ginger, 18-22 parts of Chinese-date and 18-22 parts of gypsum. The preparation method comprises the steps of soaking the cassia twig and the ginger, extracting to obtain volatile oil and liquid medicine for standby application; then mixing the drug dregs and other crude drugs, extracting to obtain liquid medicine, mixing the liquid medicines obtained from the above two steps, then concentrating, spraying and drying to obtain a drug extract; and finally, mixing the extract with a pharmaceutically acceptable carrier or a drug excipient according to proportion, pelletizing and drying, and adding the standby volatile oil to prepare the antiviral influenza drug. The antiviral influenza drug has obvious curative effect, can be used in large range, and is convenient to take, accurate in curative effect, controllable in quality, simple in manufacturing process flow, controllable in quality standard, energy-saving in energy resources, free from environment pollution, small in potential safety hazard, and suitable for industrial production.