The utility model relates to a socket pulls out service test device, the on -line screen storage device comprises a base, the vertical support that is equipped with in base top, the base top is equipped with the clamping device who is used for the centre gripping socket, clamping device connects in the support, the socket is furnished with plug weight assembly, be connected with on the base and accept the board, accept a board and base spring coupling through a plurality of vertical settings, it is located clamping device under to accept the board. Accepting the board and being used for accepting the plug weight assembly who drops from the socket, under the effect of spring, the plug weight assembly who drops obtains the buffering, has reduced the speed that drops, prevents that it from directly dropping to the base on afterwards with very fast speed, causes the damage of plug and the wearing and tearing of weight, influences measuring result's accuracy nature.