The invention relates to the technical field of ship life force, in particular to an anti-sinking stabilizer of a ship. The anti-sinking stabilizer of the ship comprises an inflation device, an airbag and a linkage device. The inflation device is connected with the airbag. The airbag is connected with the linkage device. The inflation device comprises a high-pressure air cylinder and an air pipe system. The high-pressure air cylinder is connected with the airbag through an inflation pipe system. The airbag comprises a bag body and an airbag pocket wrapping the bag body. The bag body is provided with a plurality of air chambers, and each air chamber is provided with an inflation opening and a deflation opening. The linkage device comprises a linkage disc, an airbag support and bearing piles which are connected in sequence. The linkage disc is connected with the airbag. Compared with the prior art, only the bearing piles need to be additionally mounted on an existing ship, and the four bearing piles additionally mounted on a ship board are located on the two sides of a bow and the two sides of a stern respectively. The modifying difficulty on the ship is relatively small, and the realistic feasibility of engineering realization is high. Modification of a ship body is small, and the influence on the existing performance of the ship is small. The anti-sinking stabilizer is simple in structure and high in reliability.