In this paper, the adjustment model of ten UAV circular formation is established. Since the UAV cluster needs to avoid external interference as much as possible when conducting formation flight, electromagnetic silence is the limiting condition. Based on the method of bearing-only passive positioning, this paper constructs a geometric model to calculate the deviation degree of UAV, and uses the Angle difference method to define the deviation range, and the maximum deviation degree of the formation that can be adjusted. It then uses two UAVs in a standard position and one that is slightly offset to emit as few signals as possible for each adjustment. Finally, iteration algorithm is used to correct the location of the offset UAV.
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