The invention belongs to the technical field of food processing, and in particular relates to a preparation method of vegetable protein drink containing seeds of paeonia suffruticosa. The vegetable protein drink is prepared by adopting the paeonia suffruticosa seeds as the raw material, and adding various auxiliary materials, such as a sweetening agent, a stabilizer, an emulsifying agent, fresh milk and / or walnut kernel, almond, peanut kernel and / or red dates, lycium chinense, lotus seed and / or lemon juice, apple juice, tomato juice, compound juice of carrot juice and / or vitamin C, lecithin and taurine. The vegetable protein drink containing seeds of the paeonia suffruticosa prepared by using the method disclosed by the invention has the effects of nourishing the liver and the kidney, warming the lung, lubricating the intestines, benefiting Qi and nourishing blood, moistening dryness and resolving phlegm, boosting the brain and nourishing the stomach, and can improve the immunity. When the method disclosed by the invention is used for preparing the paeonia suffruticosa drink, the utilization value of the seed of the paeonia suffruticosa is developed, and a new method for prompting the human health and improving the immunity is provided.