Aiming at the problem of index fusion in the training evaluation of unit level battlefield damage assessment and repair (BDAR) action simulation, a quantitative index evaluation model of BDAR action training based on improved efficacy coefficient method is proposed. Taking the work plan making ability in the action preparation phase as the research object, this paper analyzes the corresponding quantitative and qualitative index parameter requirements, and calculates the quantitative index evaluation value by using the improved efficacy coefficient method combined with the qualitative index evaluation value determination method based on D-S evidence theory. The example analysis results show that the evaluation model maintains the consistency with the qualitative index evaluation level, establishes the foundation for the index fusion in the BDAR action simulation training evaluation system, and is effective and practical.