Method for improving balancing accuracy of rotor model in wind tunnel test

The invention provides a method for improving rotor model wind tunnel test balancing accuracy, and belongs to the technical field of aviation aerodynamic force wind tunnel tests. Comprising the following steps: based on the influence of rotor induced speed, tunnel wall interference induced wind speed and rotor disc attack angle change on propeller hub load, setting rotor real tension to be equal to rotor nominal tension, and calculating the corrections of the rotor induced speed and tunnel wall interference on the wind speed and the rotor inclination angle; and rotor pulling force is calculated based on the correction amount of the tunnel wall interference to the wind speed and the rotor inclination angle, iterative calculation is carried out until convergence is carried out to obtain the real rotor pulling force, the final rotor body shaft pulling force and the resistance balancing value are decomposed to a wind shaft system, and the rotor wind shaft lifting force and the resistance balancing target value ar