Bracket device for welding bus tube

The invention relates to a bracket device for welding a bus tube. The bracket device for welding the bus tube comprises a main bracket (11), a rotation roller bracket (12), a rotation transmission mechanism (15), a lifting mechanism (14), at least one rotation roller (121) and at least one pair of roller wheels (131), wherein two roller wheels in the pair of roller wheels (131) are arranged side by side, are rotationally connected with the main bracket (11) at the same axis height and are used for positioning and supporting the bus tube; the rotation roller bracket (12) is connected with the main bracket (11) by a manner of sliding up and down; the lifting mechanism (14) is connected with the rotation roller bracket (12) and is used for driving the rotation roller bracket (12) to slide up and down; the rotation roller (121) is rotationally supported by the rotation roller bracket (12), is connected with the rotation transmission mechanism (15) in a transmission manner and is used for axially moving and transmitting the bus tube. The bracket device for welding the bus tube has the beneficial effect of being complete in function and compact in structure, well matching with the automation performance of an automatic welding machine and exerting relatively high automation performance.