Welding auxiliary device and method for new energy bus top framework fixing plate

The invention belongs to the technical field of auxiliary welding, and provides an auxiliary welding device and method for a top framework fixing plate of a new energy bus, a first adjusting mechanism and a second adjusting mechanism are arranged between a fixing base and a working platform, during welding, firstly, framework profile steel is placed on a framework tailor-welding tool provided with the auxiliary welding device; after the working platform is matched with the profile steel to be stressed, the first adjusting mechanism and the second adjusting mechanism are stressed and compressed to absorb height errors, and the working platform is hinged to the first adjusting mechanism and the second adjusting mechanism to incline, so that the upper plane of the working platform is flush with the lower planes of the two profile steel; then, a to-be-welded fixing plate is placed on the working platform between the two pieces of profile steel, and the planeness of the lower plane of the to-be-welded fixing plate