The utility model discloses a synchronous detection device of exempting from to climb ware and preventing weighing down safe slider, including the guide holder, the stand pipe, buffer gear, a micro -gap switch, the 2nd micro -gap switch and switch mounting seat, be equipped with a micro -gap switch and connecting pipe on the guide holder, stand pipe lower part movable sleeve is located in the connecting pipe, the stand pipe bottom is equipped with the trigger mechanism, be equipped with buffer gear in the stand pipe, the stand pipe top is equipped with the switch mounting seat, be equipped with the 2nd micro -gap switch on the switch mounting seat, prevent weighing down safe slider and the 2nd micro -gap switch contacts, a micro -gap switch and the 2nd micro -gap switch and electric connection of control module of exempting from to climb the ware. When preventing that it can't normally slide to weigh down safe slider hairpin, detection device can trigger a micro -gap switch or the 2nd micro -gap switch to send stop signal to control module, timely arrestment, the equipment that prevents takes place to damage or passenger's accident of causing danger, safe and reliable more.