Abstract: In the design process of multi-sensor system, a visual simulation analysis system is urgently needed to analyze its detection power range. For this demand, a visual simulation method of multi-sensor power range based on calculus idea is proposed, combined with the practical work of multi-sensor system. In the proposed method, according to the actual situation of the power coverage area of the multi-sensor system, firstly two geometric laws about multi-circle intersection are summarized. Secondly, differential processing of detection power boundary and range of multi-sensor system is carried out based on calculus idea. After that, the detection power boundary and range of the discretized multi-sensor system are screened in terms of the two geometric laws summarized. Then, the detection power boundary and range that meet the screening conditions are integrated. Finally, with the help of the visual window of the software, the simulation display of the detection power range of the multi-sensor system is completed.