Method for conveying vehicle body between welding production lines and welding device

The invention relates to technical field of vehicle body manufacture, in particular to a method for conveying a vehicle body between welding production lines, and further relates to a welding device. The method for conveying the vehicle body between the welding production lines comprises the following steps: S1, conveying a body-in-white to the upper end of a welding station through a vehicle body conveying mechanism; S2, conveying the body-in-white to the welding station, and positioning the body-in-white, wherein the step S2 comprises the following steps that a1, an elevating guide rail of the vehicle body conveying mechanism drives the body-in-white to descend to the welding station, and positioning upright columns of a side surrounding positioning upright column mechanism are in erected states, b1, a side surrounding positioning mechanism descends and is supported by the side surrounding positioning upright column mechanism, and c1, the body-in-white is clamped by fixtures of the side surrounding positioning mechanism and a frame positioning mechanism; S3, welding the body-in-white to be welded at the welding station. The invention further provides the welding device. The vehicle body conveying method disclosed by the invention is better adapted to the production rhythms, and improves the production efficiency. Meanwhile, the welding device further meets the requirements of the vehicle body conveying method on adapting to the production rhythms and improving the production efficiency.