To meet the structural stiffness and lightweight requirements of satellite engine brackets，the applicability and reliability of 3D printing technology for manufacturing such components were investigated.Taking the 3D printed flange and upper joint of a satellite engine bracket as the research objects，the macroscopic mechanical properties and internal quality of the coupons were evaluated through mechanical testing，X-ray inspection，and fluorescence testing.Adhesive bonded performance and structural stability were assessed via tensile-shear tests，tube shear tests，and high temperature static loading tests.The verification results show that the mechanical properties of the coupons meet the design requirements （Yield strength ≥180 MPa，elastic modulus 65-85 GPa，elongation at break ≥7.0%）.The internal and surface quality of the parts meet acceptance criteria.The tensile-shear strength of the adhesive joints is ≥16 MPa，and tube shear failure loads of both room temperature and high temperature significantly exceed qualification level loads.Vibrationtest data for the 3D printed joint support and engine assembly are superior to those of the conventional braided joint bracket.Overall，the satellite engine bracket manufactured using 3D printing technology satisfies application requirements in terms of mechanical performance，adhesive bond quality，and structural stability，demonstrating strong engineering reliability.