Now the state norms of the bridge falsework have not yet been promulgated, and falsework design theory is seriously inadequate, which make it hard to guarantee the stability of bridge falsework and results in a series of bridge falsework collapse accidents in recent years. Based on the test of overall stability of the bridge falsework, AHP is used to give scoring weight to effect factors-the scoring weight, which can measure stability impact of bridge falsework. In order to measure their impact on the level of support stability, scissors-shaped, sweeping-ground bar and the fastener's initial defect were given weight. the setting of the scissors-shaped support is the biggest factor to affect the stability of bridge falsework, The setting of sweeping-ground bar and the fastener's initial defect are similar factor to affect stability of the bridge falsework , they are also important factors, The extent to tighten fastener and the vertical and horizontal distance between vertical poles are relatively small factors to affect the stability of the bridge falsework, Some suggestions were proposed for reference of Bridge falsework design and construction.
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