The invention discloses an open air-cooled low-temperature refrigeration house for recovering the cold energy of the liquefied natural gas. The refrigeration house comprises a cold air treatment box positioned at one side of the refrigeration house, and the cold air treatment box is connected with the upper part of the refrigeration house through an air supply pipe and is connected with the lowerpart of the refrigeration house through an air return pipe; a heat exchanger is arranged at the bottom of the cold air treatment box and is connected with an outlet of the liquefied natural gas circulation through a liquefied natural gas pump, and a fan is installed above the heat exchanger and is located below an air inlet of the air supply pipe. According to the present invention, the cold energy of the liquefied natural gas is fully recycled, the open air supplies cold to a cold chamber, the heat exchanger is not needed in the cold chamber, the frosting is avoided, the system equipment is simple, the initial investment and the energy consumption are low, the utilization rate of the cold energy of the liquefied natural gas is increased, and the energy conservation and the environmental protection are achieved.