For monitoring the health and safety of jacket platform, it is necessary to divide the safety level of each component. Digital labels are built for evaluating the residual life of structure effectively. The important basis of dividing the safety level is estimating the failure consequence of component reasonably. One failure consequence evaluation method of components based on the ratio of strength reserve, safety margin, plastic resistance, reliability is proposed. The failure paths of structures and safety importance of components are obtained by structure collapse analysis. The high risk components and the high contribution gradient components in the structure are assured, which are the key components. The failure consequence index of each key component is calculated separately. The safety levels of the key components are divided according to each index, thereby the failure consequence is evaluated effectively. This method is applied to a jacket platform in Bohai Sea. A reasonable result of safety level division can be obtained.