The invention relates to a plaster for improving facial nerve paralysis and a preparation method thereof, which comprises main ingredients and auxiliary materials. According to the weight ratio, the main ingredients are processed 30-40 parts of Schizonepetae, 30-40 parts of Fangfeng, and 50-60 parts of Chuanxiong , 50-60 parts of angelica, 50-60 parts of raw rehmannia, 40-50 parts of rehmannia glutinosa, 30-40 parts of Atractylodes macrocephala, 60-70 parts of Angelica dahurica, 60-70 parts of notopterygium, 60-70 parts of lovage, 20-30 parts of licorice , 40‑50 parts Poria cocos, 40‑50 parts Codonopsis pilosula, 50‑60 parts Astragalus membranaceus, 40‑50 parts safflower, 30‑40 parts blood remaining charcoal, 40‑50 parts rhubarb, 40‑50 parts ephedra, 10‑15 parts Asarum, 15-20 parts of castor beans, 30-40 parts of centipede, 25-30 parts of scorpion, 10-20 parts of borneol and 5-15 parts of nuxe; Composed of 2 times the amount of Huang Dan. The plaster of the present invention has a rapid effect on facial paralysis caused by various reasons. It can be obviously relieved after 1-3 days of application, and can be cured after 1-2 weeks of application. The effect is remarkable and rapid, and it is suitable for patients of all ages. The traditional Chinese medicine prescription is made into a plaster, which is convenient to use, safe and reliable, economical and convenient, and relieves the pain of taking the medicine.