Aiming at the problem that there is no unified standard for the calculation of lifting caisson floating stability,the force of the lifting caisson is analyzed in detail through moment balance analysis and floating center movement calculation,and the theoretical derivation is made for the calculation of lifting caisson floating stability.Calculation formula for the equivalent metacentric height in small dip angle is obtained.The calculation table of lifting caisson is designed and the relation diagram of lifting force,draft and metacentric height is drawn.The economic and reasonable distribution method of ballast and lifting force is given using chart analys method,combined floating distance and channel depth limitation.Finally,it can provide reference for the floating transportation engineering of lifting caisson.