Construction temperature below 5 ℃, in the welding of the construction of reinforced, must strict controls of all aspects of welding, choosing welders must have posts certification, professional quality, and regulations to carry out the welding work, according to the requirements of welding in the welding process, safety consciousness must be stronger, only do nip in the bud to avoid electric shock, fire and other accidents. Before starting the large area welding work, it is necessary to conduct trial welding and then inspect it. All the indexes meet the requirements before starting the actual welding work. At the same time, the technological parameters of gecko should be reasonably adjusted according to the actual situation. After completion of welding, check the appearance of component joints to ensure a beautiful appearance.