In order to ensure the pointing accuracy of radar, shipborne radar was usually fixed on the vessel by screw connection. This connection mode will make the radar suffer severe impact in the underwater explosion impact environment, which was seriously affects the safety of radar equipment. For this reason, an array buffer system composed of cut-off excitation buffer was proposed, which has the characteristics of rigidity under low impact and flexibility under strong impact. The contradiction between keeping accuracy under low impact and keeping strength under strong impact was effectively alleviated. Then take the array buffer system as the research object, the mechanical properties of the newly developed buffer system were systematically analyzed through some important tests such as the stiffness test of elastic elements, buffer dynamic characteristic test, impact test and bump test of the array buffer system, so as to provide reference for the subsequent experimental research of the newly developed buffer system.