Abstract: A nuclear power plant with heavy steel structure has a total weight of more than 8,000 tons and a complex structure. The steel columns are divided into two layers, with a total of 128 pieces. The heaviest single weight is about 34 tons and the longest member is about 31 meters. Column installation and lifting, the traditional method is to use rope binding or column welding lug lifting. The rod paint will be damaged when the rope is tied and lifted. How to avoid the disadvantages of the traditional hoisting method, according to the structural characteristics of each layer of column, innovation of three kinds of steel column lifting auxiliary devices can effectively solve the above difficulties.