The installation of 3D printing technology requires that after the completion of the verification of materials and processes, the permissible value test of specimen level additive manufacturing materials and the additive manufacturing part-level test will begin. Due to the process characteristics of additively manufactured parts, there is usually a difference in the mechanical properties of XY direction and Z direction, and there is a difference in the characteristics of the same sex in the design of traditional metal parts, so it is necessary to test its mechanical properties in simulating the real flight state. This paper takes the additive manufacturing gust lock bracket as an example, first calculates the maximum load state in the operation process of the aircraft, selects the most typical load direction for tooling test scheme design, before the test starts, engineering calculation and software simulation are carried out to predict the failure mode and failure load, the test results show that the results of software simulation and engineering calculation are accurate and effective, and the mechanical properties of the additively manufactured titanium alloy gust lock support are stable, can withstand the test of extreme working conditions, and meet the installation requirements.