In existing backscatter communication research, the communication performance difference of backscattering equipment at different positions in the system is large, we face the serious fairness problemin order to overcome the defects of existing research,the invention provides an unmanned aerial vehicle auxiliary backscatter communication device and a resource allocation control method. The control assembly comprises a data acquisition module, an unmanned aerial vehicle control module, a track control module, a communication control module and a working mode control module. The backscatteringequipment assembly comprises a ground control module, a working mode selection module, an energy receiving control module, a signal reflection control module and an energy collector. According to theinvention, the unmanned aerial vehicle is used as a control center to transmit and receive an information command to the equipment, and the backscattering equipment collects energy or reflects a signal to transmit information. The flight path is optimized by utilizing the flexible mobility and operability of the unmanned aerial vehicle, so that the distance between the unmanned aerial vehicle andthe sensor is effectively shortened, and the throughput of a communication system is improved.