Universal mold for spot welding

The invention discloses a universal mold for spot welding. The universal mold comprises two subframes which are vertical to each other, wherein a hole spacing sliding track is arranged on each subframe; the universal mold also comprises one fixed end hole site control assembly and at least one movable end hole site control assembly; each hole site control assembly comprises two datum line slidingtracks, datum line control blocks which are mounted on the datum line sliding tracks in a sliding manner, and a first limiting mechanism; the two datum line sliding tracks of each movable end hole site control assembly are arranged on the corresponding hole spacing sliding track in a sliding manner; and each movable end hole site control assembly further comprises a connecting rack for connectingthe corresponding two datum line sliding tracks, and a second limiting mechanism. According to the universal mold for spot welding, the corresponding hole spacing and datum line distance can be adjusted according to requiremen