The invention discloses a connected unmanned aerial vehicle formation and a control method thereof, and belongs to aircraft design. The unmanned aerial vehicle formation comprises a plurality of fixed-wing unmanned aerial vehicles, and the adjacent unmanned aerial vehicles are fixedly connected through connecting mechanisms. Each connecting mechanism comprises a carbon tube and a connecting part.One side of each connecting part is fixed to the wing tip of one unmanned aerial vehicle, and the other side of each connecting part is fixed to one end of the corresponding carbon tube. Each connecting part is used for being fixedly connected with the wing tip of an adjacent unmanned aerial vehicle to realize fixed formation of the multiple unmanned aerial vehicles. The unmanned aerial vehicles are connected together, and stable formation flight of the unmanned aerial vehicles is realized. According to the calculation result of the computational fluid mechanics software, through close-range formation flight of multiple unmanned aerial vehicles, the lift-drag ratio of a single unmanned aerial vehicle is increased by 20%, and the voyage and endurance of the unmanned aerial vehicles are improved. Besides, through secondary distribution of the overall formation control instruction, the load borne by the connecting mechanisms is reduced by 45%, the requirements for the structural strengthand rigidity of the connecting mechanisms are lowered, and the structural weight is reduced.