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Guidan Highway super large bridge of Guangzhu railway engineering is a three-span (60m+100m+60m) continuous box girder bridge, which was constructed by using hanging basket cantilever method. On the basis of the analytic theory of 3D finite element forward/reverse, the linear monitoring of the whole bridge was done through controlling the template elevation of box girder (pre-camber). The result of monitoring shows that the linear of construction satisfies the requirements of design and specification and the bridge can be closed smoothly.