The invention discloses chewing gum for strengthening and consolidating body resistance and a preparation method thereof. The chewing gum is prepared from the following raw materials in parts by weight: 50-100 parts of ginseng, 20-30 parts of astragalus root, 20-30 parts of gum base, 60-70 parts of sweetener, 5-7 parts of emulsifier and 1-2 parts of spice. The preparation method comprises the following steps: milling the ginseng and the astragalus root into superfine powder with a particle size of less than 50 microns (fully passing through a 300-mesh sieve) by utilizing a jet mill; preheating for softening the gum base, putting the softened gum base as well as a half of the superfine ginseng powder, superfine astragalus root powder, xylitol, sorbitol, isomaltitol and glycerin into a kneader, and fully and evenly mixing; then, adding the other half of the superfine ginseng powder, superfine astragalus root powder, xylitol, sorbitol, isomaltitol and glycerin into the kneader, and evenly mixing; and finally, adding mint oil, and kneading and extruding for forming the chewing gum according to a conventional method. The chewing gum disclosed by the invention has the beneficial effectsof refreshing breath and strengthening and consolidating body resistance, has good taste, simple components and good repeatability, is simple in operation, and is suitable for large-batch production.