The utility model discloses a bridge on-line monitoring display device. MODEL BODY, the model body comprises a basic simulation body and a bridge plate simulation body erected on the basic simulationbody. The middle part of the bridge plate simulation body is suspended; the model body further comprises a plurality of pier simulators. Wherein the bridge plate simulators are used for supporting thesuspended parts of the bridge plate simulators, when the number of the bridge plate simulators is larger than one, the bridge plate simulators are arranged in the length direction of the bridge platesimulators, the bridge plate simulation model further comprises a plurality of detection device simulators arranged on the model body, and each detection device simulator is a lamp with an adjustablelighting state. The display device can visually reflect the influence of the arrangement, external load or external influence of corresponding sensors on the plate-type bridge when the online monitoring is applied to the plate-type bridge.