The invention discloses a diet biscuit. The diet biscuit comprises codonopsis pilosula, astragalus mongholicus, roots of bidentate achyranthes, plantain herb, capsella bursa-pastoris, houttuynia cordata, portulaca oleracea, bamboo leaves, fennel, orange peels, hot pepper, frosted folium mori, poria cocos, pseudo-ginseng, zanthoxylum bungeanum, pumpkins, sweet potatoes, kelp, ginger, soybeans, sesame, cinnamon, celery, sticky rice, non-glutinous rice, wheat, millet, corn, pork and beef. The method for making the diet biscuit comprises the steps that the codonopsis pilosula, the astragalus mongholicus, the roots of bidentate achyranthes, the plantain herb, the capsella bursa-pastoris, the houttuynia cordata, the portulaca oleracea, the bamboo leaves, the frosted folium mori, the poria cocos, the pseudo-ginseng, the fennel, the zanthoxylum bungeanum, the ginger and the cinnamon are decocted, thick juice is obtained for use, the pumpkins, the sweet potatoes, the kelp, the soybeans, the sesame, the celery, the pork, the beef, the orange peels and the hot pepper are smashed and steamed, the sticky rice, the non-glutinous rice, the wheat, the millet and the corn are smashed and then fermented, all the obtained materials are mixed and made to be in a biscuit shape, and then the diet biscuit is obtained after baking.