Abstract: In order to solve the problem that the existing global navigation satellite system receiving antenna for high precision measurement can’t meet the millimeter-level positioning accuracy and high data inversion accuracy, a new global navigation satellite system reflected signal altimeter positioning antenna is designed. The antenna structure is simulated from aspects of static strength, dynamic strength and dynamic stiffness. And the fundamental frequency and safety margin of the antenna are calculated. The simulation results show that the positioning antenna meets the resistance environmental design requirements. This positioning antenna has the advantages of simple structure, reliable connection, small size and good adaptability to space environment. It is of guiding significance to the structure design of similar space-borne positioning antennas.