This paper aims to solve the technical problems such as short endurance of unmanned aerial vehicle,and mainly focuses on long-endurance multi-rotor unmanned aerial vehicle.The unmanned aerial vehicle is designed to include no less than 6 propellers and connect to the corresponding drive motors,rigid cross-connect brackets,batteries,and control system.Each propeller needs to be fixedly connected with the rigid cross-bracket respectively,and is connected with the control system through the battery and the drive motor.Using this design,the control system can effectively adjust the specific speed of drive motor,so as to realize the stable attitude of unmanned aerial vehicle.