The invention discloses a liquefied natural gas gasification system capable of continuously absorbing heat under a low-temperature air environment, and belongs to the field of liquid natural gas gasification. The system comprises an LNG storage tank, an LNG storage tank built-in supercharger, a main air temperature type vaporizer vortex tube, an air temperature type heat exchanger, a heater and apressure regulating device. According to the system, when an air temperature type vaporizer cannot enable LNG to be gasified and heated to reach a conveying temperature, a combined heating unit composed of the vortex tube, the air temperature type heat exchanger and the heater is used for heating low-temperature NG so that the low-temperature NG can reach the conveying temperature; the vortex tubeenables part of the low-temperature natural gas to be heated to directly reach the conveying temperature; the other part of the natural gas continues to absorb heat from the air through the air temperature type heat exchanger, and then is heated by the heater to reach the conveying temperature; and the system has the advantages that energy consumption of the water bath type heater is greatly reduced.