This article explores the influence of factors such as the ratio arm value and bridge arm resistance/alue on the sensitivity of the Wheatstone bridge experiment by constructing a simple Nike function. Themalysis shows that the influenee of the ratio arm value on the sensitivity of the bridge depends on theidjustment method of the ratio arm.By adjusting different bridge arm resistanees to change the ratio arm , thenlluenee of the ratio arm on the sensitivity of the bridge is dilrerent: When the ratio arm value is fixed .thereexist a set of bridge arm resistance values that maximizes the sensitivity of the bridge.