The invention discloses goose flavoring marinade and a preparation method thereof. The goose flavoring marinade is prepared from fresh goose, vegetable oil, old ginger, garlic kernels, celery, pod peppers, Chinese rice wine, rib soup, soybean sauce, fine salt, rock candy, monosodium glutamate, a proper amount of water and seasoning. The preparation method includes the following steps that firstly, goose sauce is prepared for use; secondly, a seasoning bag is prepared for use; thirdly, soup is prepared for use; fourthly, the seasoning bag is placed in the soup to be heated and then filtered, and flavoring liquid is obtained for use; fifthly, the goose sauce is placed into the flavoring liquid, monosodium glutamate is added, the mixture is boiled and then slowly decocted on low fire, the mixture is naturally cooled, and the goose flavoring marinade is prepared. The prepared goose flavoring marinade is sharp in fragrance, strong in taste, unique in taste, high in nutritional value and good in physiotherapy health-care effect, the process is simple, the technology is easy to master, production efficiency is greatly improved, and the method is suitable for application and popularization.