The utility model discloses a multiplex's satellite ground testing cable transfer case, including the vertical switching box and the formula switching box that sinks, all be equipped with the first interface that is used for the linked network line, the third interface that is used for connecting the second interface of high frequency wiring and is used for connecting the low frequency wiring on vertical switching box and the formula switching box that sinks, vertical switching box is located more than the satellite test ground, and the formula of sinking switching box is located satellite test below ground, the utility model discloses a not enough difficult problem of the rigidity of installation version has by a large scale been overcome to the mode that baffle, splint combined together, optimize collocation through low frequency cable, network line, synthesizing of high frequency cable, effectively solved satellite ground and synthesized test cable randomly arranged, unmanageable problem, through the formula switching box design of sinking, compensatied the patch cord and occupy the great defect of testing site.