The utility model belongs to the technical field of the bridge engineering test, particularly, involve a bridge vertical displacement test system. The test system includes bridge, cable, last rings, triangle square position, lower rings, displacement meter, table skeleton, spring, drag hook, sandbox, the bottom surface of bridge is fixed in to cable upper end, and the lower extreme is connected through last rings and triangle square position, spring upper end is connected through rings down and triangle square position, and the lower extreme passes through the drag hook and is connected with the sandbox, the table skeleton is a shape, goes up the left end and installs the displacement meter, and the lower extreme passes through magnetic base and is connected with the sandbox, the displacement meter still is connected to triangle square position bottom. Compared with the prior art, bridge vertical displacement test system simple structure, simple to operate, all accessories all can be placed in the sandbox, shared volume is less, the test result is accurate, easily realizes promoting, and is applicable in bridge vertical displacement's extensive accurate test.