In regard to the typical search route of the antiradiation UAV in the execution of SEAD mission, there are two kinds ofrunwayshaped and “8”shaped. In this paper, the "field coverage rate" index is established to measure the suppression effect of two typical search routes on the target radar, and the optimization of these two typical search routes is realized. For this reason, firstly, the field coverage of the two search routes is obtained by establishing a mathematical model, and then the influence of the turning radius of the UAV and the linear length of the route planning space on the coverage of the two search routes is analyzed. The influence of the horizontal mechanical field of view of the UAV seeker on the theoretical calculation of the field coverage of the two search routes is considered. The calculation results show that the field coverage of the two typical search routes is less than 50% when the planning space size of the route and the turning radius of the drone are fixed, but the field of view coverage of the “8” shaped search route is significantly higher than that of the runwayshaped search route. The “8” shaped search route has a good suppression effect on the target radar.