Temporary support for installing steel pipe arch

The utility model discloses a temporary support for installing a steel pipe arch, which belongs to the technical field of arch bridge construction and comprises a plurality of groups of supports arranged on a main bridge, an operation protection platform is arranged at the top of each group of supports, and a positioning device is arranged in the operation protection platform detachably connected with the supports. The top of the support is provided with a height adjusting mechanism for adjusting the height of the arch rib section. According to the device, the multiple sets of supports are built on the main bridge, the height of the arch rib sections is adjusted through the height adjusting mechanism, and the arch rib sections hoisted in place are limited through the positioning device; and meanwhile, the operation protection platform at the top of each group of brackets is used for protecting the arch rib sections in the welding process, so that welding sparks and welding slag are prevented from falling off