Liquefied natural gas bin protection device

The invention discloses a liquefied natural gas bin protection device. The device comprises a shell, fixing plates are arranged outside the shell and fixedly connected with the shell in a welded mode,an isolation plate is arranged in the shell and fixedly connected with the shell through bolts, and an A-shaped structure is integrally formed between the shell and the fixing plates; and a secondarybarrier is arranged on the inner side of the isolation plate, a first main barrier unit, a second main barrier unit and a third main barrier unit are sequentially arranged on the inner side of the secondary barrier from left to right, and the first main barrier unit, the second main barrier unit and the third main barrier unit communicate with one another. According to the device, main pressure-bearing wood and auxiliary pressure-bearing wood are arranged between the bottoms of the fixing plates and make contact with the bottom of the shell to bear a liquid bin, meanwhile, the main pressure-bearing wood and the auxili