Auxiliary welding device for transverse seam of liquid storage tank

The utility model belongs to the field of liquid storage tank welding application equipment, and particularly relates to a liquid storage tank transverse seam auxiliary welding device which comprises a supporting frame, and a partition plate is arranged at the geometric center of the supporting frame and divides the supporting frame into a welding part moving area and a workpiece containing area in the left-right direction. The welding part moving area comprises two first sliding strips symmetrically arranged at the corners of the upper end of the supporting frame, a moving plate is arranged at the upper ends of the first sliding strips, a welding gun is arranged on a fixing plate, the workpiece containing area comprises a push-pull plate, and a limiting containing plate designed in an arc shape is arranged at the upper end of the push-pull plate. The automatic welding device is reasonable in design, simple in structure, convenient to machine and capable of effectively replacing manual work to complete workpi