In close formation flight of multi-UFVs, the trailing UFV needs to maintain a relatively close flying distance with the leading UFV and its neighboring UFVs. In such a situation, the wake vortices generated by the leading UFV can be efficiently utilized to impose induced velocities on the trailing UFVs, so as to reduce the trailing UFVs’ drag, fuel consumption, and extend the ranges and endurances. Moreover, such a close formation flight pattern is in line with the current pursuit of fuel economy and environmental protection considerations in low-altitude economic environments. In the future, close formation flight may become one of main flight patterns of multi-UFVs in low-altitude economic environments. Therefore, this chapter further considers the close formation flight control design for multiple trailing fixed-wing UFVs in the formation team, which extends the control design for single trailing UFV in Chap. 8 .