Since aircraft survivability evaluation is necessary and it is fuzzy and uncertain, a new evaluation method based on interval number was proposed. The index system for aircraft survivability evaluation was constructed by susceptibility, vulnerability and combat capability, the interval weights were calculated based on interval-based analytic hierarchy process and information entropy, the evaluation model of aircraft survivability was established based on weight coefficient. In the end, a numerical example was given. Calculation results show that the method is effective and feasible.