In order to solve the problem of high temperature gas flow field test in the whole process measurement of aero engine, a rotating multi?section and multi?parameter flow field scanning and measurement device was developed. The designed rotary scanning measurement section was used to replace the original hybrid diffuser section of a certain type of aero engine, the circumferential measurement point encryption was realized by controlling the rotation of the measurement section, and the temperature field, pressure field, velocity field, direction field and other parameters were measured at the turbine outlet and afterburner inlet of the aero engine at the same time. The feasibility of the design of the rotary scanning measurement device, the layout design of the temperature / pressure / velocity multi?field synchronous test, the reliability design of the probe, the accurate measurement of the temperature of high?temperature gas with a large declination angle, and the complex three?dimensional flow field measurement scheme with a large declination angle were verified by experiments. Then, tests were conducted under the test conditions of a certain type of aircraft engine to verify the practical application effect of the rotating multi?section and multi?parameter flow field scanning measurement device. This study provides important technical support for the performance evaluation and component matching research of aircraft engines.