The invention relates to 
laser machining and 
positioning equipment, in particular to an isomagnetic adaptive positioning mechanism for multi-group 
laser tailor welded blanks, which comprises a support, a spindle, two telescopic joint arms and a plurality of magnetic 
layers, wherein the spindle is rotatably mounted on the support, one end of the spindle extends from the support and is connected with a first 
handle, the magnetic 
layers are evenly distributed on two sides of the spindle and reciprocate along guide rails arranged in the length direction of the support through sliders, the magnetic 
layers are connected with the spindle through the two telescopic joint arms, and the spindle is driven to rotate by the first 
handle so that the magnetic layers reciprocate along the direction perpendicular to the spindle. As the magnetic layers are capable of reciprocating axially along the spindle and along the direction perpendicular to the spindle, positioning is accurate, smoothness of 
laser machining is ensured, and multi-group feeding plates are rapidly positioned. The magnetic layers can be constantly close to a feeding 
pile, so that magnetic uniformity of the feeding 
pile is sufficiently ensured, difficulty in keeping feeding uniformity during multi-group 
welding is reduced, and feeding efficiency is improved.