The technique for building multi-sensor coalitions is studied.With consideration of the precision and energy consumption requirements for single target detection,the specific process for building multi-sensor coalition is presented,and the model of the multi-sensor coalitions is built up.The wolf pack algorithm is introduced and improved to seek the optimum multi-sensor coalition scheme.The simulation result indicates that the process of building multi-sensor coalitions is feasible,the model is rational,and the algorithm is effective.