Abstract: The flow field of the core engine inlet was numerically calculated to solve the problem that the air flow measured in the air simulated test facility was inconsistent with ground test.The results show that the static pressure is fairly even in the section away from the front edge of the guide disk at a distance between 1.2D and 1.45D.The above-mentioned problems were attributable to the unevenness of the distribution of static pressure along radial direction.The numerical analysis was consistent with experimental results by adjusting the measuring section,and the above-mentioned problem was solved.