Based on the combination of outfield test and mathematical simulation experiment, a method for evaluating blanket jamming distance of netted radar based on operational scenario simulation is proposed. Firstly, the radar network data fusion simulation model is proposed based on the spatial situation and target characteristics. Secondly, the network radar blanket jamming distance test evaluation method is established. Thirdly, the radar electronic warfare simulation evaluation reckoning view system named EwserView is given. Finally, combined with this software system, the test evaluation example and interface of substitute equivalent reckoning method are offered. This method can solve the test evaluation problem of netted radar based on test situation, and the feasibility and effectiveness of this method are verified in experiments.