This paper aims to demonstrate the built bridge still in accordance with design standards and satisfying the use requirement through analyzing the results of loading test on Jinsha-Shanzhang overpass. According to design information, a theoretical model is built for simulating each condition with the finite element analysis software Midas-Civil. A comparison is carried out over parameters such as deflection, strain and frequency to detect the actual mechanical behavior and operating condition of bridge structure under various working forces. The experimental results can provide basis and references for the rectification of finite element model and final acceptance of construction, also for the evaluation of service behavior and health monitoring of the bridge.