Abstract: The vulnerability assessment method for dead-ship stability failure mode of intact ships has already been proposed by International Maritime Organization(IMO).However, the relevant method for the damaged ship has not yet been presented due to the complexity of the damaged ship's motion under dead-ship conditions.Based on the theory of the former case, this paper presents a way of assessing the capsizing probability of the damaged warship.The method is then verified with the calculating results of actual examples, and the influence of each parameter is discussed.Furthermore, the cases of cross flooding and unsymmetrical flooding are investigated.The method provides certain references for calculating the capsizing probability of the damaged ship.