Liquefied natural gas storage tank having improved insulation structure and method of manufacturing the same

The present invention relates to a liquefied natural gas storage tank (10) having an improved insulation structure and installed in constructions such as ships, ground tanks, vehicles and the like, and a method of manufacturing the same. An object of the present invention is to provide a liquefied natural gas storage tank having an improved insulation structure and a method of manufacturing the same, wherein sealing reliability can be increased by simplifying structures of insulation and sealing walls and an assembling mechanism between the walls and improving the assembling work and a time taken to construct the tank can be reduced by simplifying the manufacturing structure and process. To achieve the object of the present invention, there is provided a liquefied natural gas storage tank (10) having an improved insulation structure which comprises an insulation wall installed on an inner wall (12) of the tank, a sealing wall (150) installed on an upper surface of the insulation wall and brought into direct contact with liquefied natural gas, and a plurality of anchor structures (130) installed on the inner wall of the tank through the insulation wall to support the sealing wall.