The invention discloses a plant extract composite buccal tablet, comprising the following raw materials: L-leucine, resveratrol, quercetin, anthocyanin, fisetin, pterostilbene, nicotinic acid, folic acid, chromium, magnesium, Coenzyme Q10, curcumin, lipoic acid, green tea extract, and milk thistle extract. According to the invention, the purely natural plant substances such as green tea extract and milk thistle extract added to the buccal tablet have significant therapeutic effect on respiratory diseases, digestive diseases, circulatory diseases, urinary system diseases, endocrine diseases, metabolic diseases, lymphatic diseases, neurological system diseases, connective tissue disease, gynecological diseases, otolaryngology diseases, stomatological diseases, orthopedic diseases, dermatological diseases, oncological diseases and other chronic degenerative diseases. Meanwhile, the buccal tablet is low in cost and free of side effects, has the efficacy of clearing heat and detoxifying, moving qi and activating blood, nourishing and strengthening body, regulating qi and invigorating stomach, benefiting qi and tonifying kidney, tranquilizing and tonifying spleen, and also is capable ofenhancing physical fitness to improve the immunity of the body to diseases.