Antennas on satellites in orbit must withstand periodic and non-uniform thermal environments, which directly affect the quality of satellite communication. Given known satellite orbit parameters and attitude, a finite element model of the antenna temperature field is established using NX TMG software to calculate the transient temperature field of the antenna in orbit. Thermal control modeling is performed on areas of the antenna that experience high or low temperatures, and through iterative optimization, Determine the thermal control plan for antennas. Subsequently, the temperature field is applied to the antenna structure’s finite element model, and the thermal deformation of the antenna is obtained using NX Nastran. The deformed antenna model is then imported into HFSS software to solve for changes in electrical performance indicators,  thereby determining whether the antenna can function normally under the conditions of an in-orbit, non-uniform temperature field.