In order to schedule the battle repair unit properly and repair the damaged equipments quickly, according to the analysis on battle repair unit scheduling in BDAR, under the constraints of urgent rush-repair mission finishing time, the logic relation between urgent rush-repair missions, the urgent rush-repair resources ability, the balance among resources, the repair cost, then, a optimal model to maximize the combat resilience recover and minimize the repair cost is established. A method of computing battle unit ability and the repair cost is studied; then, an algorithm based on GA for the model is presented in detail. Finally, based on battlefield repair task, an example is given to validate the model practicability and the solution validity.