The invention discloses a method for adjusting the rear end of an automobile, and relates to the technical field of automobile manufacturing, and the method comprises the following steps: firstly, carrying out reference position coarse adjustment on a
back door of an automobile
body in white by utilizing a penetrating type assembling and adjusting
assistive device and an adjustable hinge; secondly, a vehicle body side wall outline is scanned to establish a follow-up coordinate
system, and a high-precision reference positioning hole of a side wall
tail lamp is generated through online
punching; then, the final closing position of the
back door is determined based on the standardized lock catch position; then, the installed side wall
tail lamp is used as a fixing reference, and the exposed adjusting structure is used for conducting fine adjustment and alignment on the
back door lamp; and finally, carrying out compensatory adjustment on the rear bumper to enable the rear bumper to be matched with the adjusted
peripheral parts. According to the method, the problem of tolerance accumulation is effectively solved by decomposing the dimension chain, creating the self-adaptive reference and adopting an efficient adjustment means, the matching precision and appearance quality consistency of the rear-end component are improved, and meanwhile, the adjustment difficulty and the production cost are reduced.