Headlamp support positioning device

The utility model discloses a headlight support positioning device which comprises a base, an X-direction sliding part, a Y-direction sliding part, a first positioning tool and a second positioning tool, the X-direction sliding part and the Y-direction sliding part are both arranged on the base, the first positioning tool comprises a first installation frame, two first detachable clamp mechanisms and two first positioning pins, and the second positioning tool comprises a second installation frame, two second detachable clamp mechanisms and two second positioning pins. The first mounting frame is arranged on the X-direction sliding part, the two first detachable clamp mechanisms are arranged at the upper end and the lower end of the first mounting frame correspondingly, and the two first detachable clamp mechanisms are configured to be used for detachably clamping the two ends, in the length direction, of a longitudinal welded part correspondingly; the two first positioning pins are horizontally arranged at th