Abstract: The electric cable network, as an important channel for signal transmission, has an important bearing on the electromagnetic environment of the whole satellite or other kind of space vehicles. Due to the relatively poor shielding performance of the rectangular electric connector，an omnidirectional shielding rectangular electric connector is developed. By taking an effective measure of dealing with the hole of the shell to ensure continuity of conductivity between the shells, the whole shell can be very close to an ideal shield, thus to avoid the radioactive interference with a satisfactory shielding effect.