The ice making part of tube ice maker is evaporator, and the evaporator is composed of many vertical parallel steel tubes. The ejector on top of the evaporator will sprinkle the water evenly into each pipe in a spiral manner. The excess water is collected by the bottom tank and pumped back into the evaporator. The outer space of the steel tube has refrigerant flow and heat exchange with the water in the pipe, which cools down the internal waters to cool into ice. When the thickness of the Gingbing reaches the desired value, the water automatically stops flowing. The refrigerant heat will enter the evaporator to melt the tube ice off. When the tube ice falls, the ice-cutting mechanism runs to cut the Tube ice into the set size.