The invention belongs to a food processing method. In order to solve the technical problems in the aspects of sea cucumber eating and storage in the prior art, the invention provides a processing method of freeze-dried instant quick-dissolving sea cucumber soup. The method comprises the steps of sea cucumber treatment, soup material preparation, freeze-drying and package, wherein in the sea cucumber treatment, openings are uniformly cut on the back of the sea cucumber, and the quick-freezing is carried out on a single-freezing machine; in the soup material preparation, raw materials are boiled to be concentrated; and after the treatment completion, the sea cucumber and the soup materials are subjected to matched quick-freezing and drying, and then, the package is carried out. The processing method has the advantages that the original juice and the original favor of the sea cucumber are stored, the goal of longer-time storage without adding any preservatives and additives is reached, and the recipe of the provided soup material is conscientious, and the nutrition matching is scientific. The procedure of the processing method is conscientious, the operation is simple and convenient, and the processing method can be widely applied to the processing treatment of the sea cucumber food.