The utility model discloses a movable support that moves in edge of a wing bottom surface piping erection of labour bridge surface, relate to bridge construction field, its structure is including thedriving, the crossbeam, erect the truss, work platform, hoist engine and balancing weight etc, respectively establish one with moving movable support according to the duct length both ends of the required installation of segmentation, two are moved movable support and do the unblock at the track of bridge floor edge of a wing top surface and remove or pin fixedly along vertically laying, come withthe pipeline lift by crane and piecemeal fixed mounting in bridge floor edge of a wing bottom surface, and the visual required pipe laying branch segment length of interval between two drivings is carried out the flexibility and is arranged, simultaneously, every driving that moves movable support is all binded in the railing bottom through wire rope, it can conveniently be driven a vehicle interim fixed with effectively prevent the lateral shifting of driving along the bridge floor edge of a wing, so moving movable support and operating method in the edge of a wing bottom surface piping erection of labour bridge surface and have that simple structure, work efficiency are showing after the improvement, cheap cost, safe and reliable and application scope advantage such as wide is popularization and application that can be more extensive.