Abstract: Aiming at the problems and shortcomings of current electronic intelligence (ELINT) reconnaissance system effectiveness evaluation methods, an ELINT system performance evaluation algorithm based on combination weighting method is proposed. The algorithm firstly combines the working principle of ELINT system to build its evaluation index system. Then, based on the subjective and objective attributes of the index, the algorithm combines the G1 sequence subjective weighting method with the CRITIC objective weighting method to obtain the combined weight of each index. Finally, the weighted summation model is used to obtain the individual ability values and comprehensive performance values of each system, and the system is ranked well through comparative analysis. Theoretical analysis and simulation results show that the method effectively combines qualitative and quantitative analysis and is feasible in the performance evaluation of ELINT system.