The invention relates to a polygonal crimping cable opposite side distance measuring device. According to the polygonal crimping cable opposite side distance measuring device, measuring modules arranged in a regular polygon shape are distributed on the two clamping arms, after shutting of the clamping arms, the symmetrical measuring modules are pressed against the edges of a to-be-measured cable,all the opposite edges of the to-be-measured cable are measured through the symmetrical measuring modules at the same time. The advantages are that: the detection efficiency is high, measuring resultis stable, and reliability is high.