A cold-storage display cabinet comprises a display cabinet body, an evaporator and an outdoor unit, and the evaporator is arranged in the display cabinet body. The outdoor unit is composed of a condenser and a compressor, wherein the outlet end of the evaporator is connected with the compressor through a first pipe, and the inlet end of the evaporator is connected with the condenser through a second pipe. The first pipe and the second pipe are respectively formed by connecting a plurality of single pipeline bodies, and the adjacent single pipeline bodies are connected into a whole through lock rings. An expansion valve is arranged on the second pipe, refrigerant becomes low-temperature and low-pressure liquid refrigerant and enters the evaporator after passing through the expansion valve, and the refrigerating effect of the evaporator is achieved. The single pipeline bodies of the refrigeration display cabinet are connected through the lock rings, a brazed connection mode in the industry is replaced, the cold-storage display cabinet is easy to operate, the installation and maintenance efficiency of the product is greatly improved, and the cold-storage display cabinet is safe and environmentally friendly.