The wind tunnel test method is adopted for the fanwing aircraft to study the lift, drag and required power of the cross flow fan in different fan speed, velocity, angle of attack, front opening angle and blade installation angle. The results show that the speed of the fan is the main factor affecting the rise of fanwing force, the fanwing aerodynamic characteristics in different attack angle and flow rate are not the same, and the effects of front opening angle and blade angle of fanwing on the aerodynamic characteristics are relatively large. The fanwing working principle and the method for obtaining lift thrust of fanwing are verified by the wind tunnel experimental data. It provides technical support for the design and fabrication of unmanned aerial vehicles with large size fanwing.