Aiming at the problem that wind measurement equipment on the multirotor unmanned aerial vehicle (UAV) platform suffers from the rotorwing turbulent flow interference, based on Bernoulli′s equation, an algorithm is proposed, which utilizes orthogonality type wind pressure vector decomposition to inverse wind speed and wind direction and is suitable to be applied in multirotor UAV. Through designing the layout and structure of the pressure sensing cavity, the impact of the rotorwing turbulent flow is further decreased. The Space claim and Meshing software was utilized to establish the wind measurement model, and the Fluent software was used to change the speed and direction of the airflow in the flow field; the simulation study on the wind measurement method was carried out in different flow fields. During actual measurement, when the wind speed is higher than 2 m/s, the wind measurement error of the proposed orthogonal wind pressure vector decomposition wind measurement method is kept within 10%, which proves that the proposed method could effectively decrease the interference of the rotorwing turbulent flow on wind measurement, and achieve high accuracy wind measurement.