Aerodynamic force test method based on Stewart platform

The invention discloses an aerodynamic force testing method based on a Stewart platform. The aerodynamic force testing method comprises the following steps that S1, a test piece is arranged on an upper platform of the Stewart platform; s2, establishing a coordinate system on the Stewart platform; s3, according to the coordinate system, performing kinematics analysis on the six connecting rods on the Stewart platform, including direction analysis, attitude motion analysis and stress analysis of each connecting rod, establishing a kinetic equation of the six connecting rods, and calculating an axial force Fi and a transverse force Qi of the six connecting rods on an upper platform of the Stewart platform; s4, regarding the upper platform of the Stewart platform, the adapter and the test piece as a test piece assembly, and performing kinematics analysis on the test piece assembly to obtain pose motion parameters; s5, establishing a kinetic equation of the test piece assembly by using an Euler kinetic equation; s