The invention discloses a velocity-adjustable cold accumulation device. The velocity-adjustable cold accumulation device comprises a sealed housing; a fluid inlet is formed in the upper part of the housing; a fluid outlet connector is formed in the lower part of the housing; a plurality of layers of cold accumulation plates are arranged in the housing; a plurality of cold accumulation elements aredistributed on the cold accumulation plates, wherein the cold accumulation elements are in regular hexagonal shapes; cold accumulation materials are packaged in the cold accumulation elements; the bottoms of the cold accumulation elements are detachably mounted on the cold accumulation plates; the cold accumulation materials are foamed metal materials; and flow channels imitating a cellular structure are formed between the cold accumulation elements. The cold accumulation elements are filled with the foamed metal materials through the cold accumulation elements imitating the cellular structure, the cold accumulation elements are distributed to form the cold accumulation plates, the cold accumulation plates are overlaid to form the cold accumulation device, and the quantities of the cold accumulation plates and the cold accumulation elements in the cold accumulation device can be adjusted as required, so that the purpose of adjusting the cold releasing velocity is realized.