Research conclusions: Through emulation analysis and calculation，the movable mould can pass the span in advance and the time of erecting girder for one span with movable mould Call be shortened to 1 1 days from 1 8 days by tensioning partial stress to bear the weights of girder and movable mould when the poured concrete gets to 80％of designed strength after 3 or 4 days of concreting the girder．So the construction process is speeded up and the requirement of construction schedule can be met．