Abstract: The uprighting process of the capsized vessel considering the buoyancy and stability of the wreck has been studied in this paper. A model of the righting force for the wreck salvage is established according to the mechanical characteristics of the wreck. The analysis and calculation are demonstrated by the salvage module of GHS software in view of the problem of righting force programme， which needs long computing time and large amount of data input. Taking the simulation of righting a capsized ship as an example， a three-dimensional model is developed and the righting process is simulated by using GHS software. The maximum righting force and the occurring phase， angle of vanishing stability and longitudinal distribution of torque values can be obtained from the analysis. And the analysis results can play a crucial role in the uprighting process of the capsized ship. The uprighting process of the inclining ship can be simulated by using GHS software， which is suitable for making salvage schemes.