The invention relates to a return flight control system for an unmanned plane cluster, and the unmanned plane cluster comprises N unmanned planes, wherein the N unmanned planes are located in a hovering flight space. The system comprises a centralized control, and each of the N unmanned plane comprises a return flight control module, a first communication module, a second communication module, a controller, a switching module, a main battery and a standby power supply, wherein the return flight control module comprises a distance detection unit, an electric quantity detection unit, a comparison judgment unit, and an adjustment unit. Each adjustment unit is used for adjusting the return flight mode or adjusting a return flight destination, and each controller can switch the power supply mode between the main power supply and the standby power supply through the corresponding switching module according to a received signal of the corresponding return flight control module. The system cancontrol the return flight efficiency of a large unmanned plane cluster, achieves the real-time adjustment of the return flight strategy according to the remaining capacity of the battery of the unmanned plane, can reduce the restrictions on the area of a return flight place during the return flight of a large number of unmanned planes, reduces the cluster control cost, and saves the manpower costof the return flight cluster control.