The application belongs to the technical field, and particularly relates to a LNG double-
metal full containment tank bottom cold insulation structure. The technical scheme is as follows: a LNG double-
metal full containment tank bottom cold insulation structure, comprising an outer tank
wall plate, high-strength
foam glass bricks are constructed in the outer tank
wall plate, and the high-strength
foam glass bricks are filled with butadiene
acrylonitrile rubber between the outer tank
wall plate, the outer tank wall plate is further constructed with a heat angle protection
foam glass brick, and the heat angle protection foam glass
brick is constructed on the top of the high-strength foam glass
brick; further comprising an inner tank wall plate, the bottom of the inner tank wall plate is provided with a
perlite concrete block, a special-shaped glass brick is arranged in the annular space between the heat angle protection foam glass brick and the
perlite concrete block, and the special-shaped glass brick is constructed on the top of the high-strength foam glass brick. The LNG double-
metal full containment tank bottom cold insulation structure can effectively reduce cold leakage.