The utility model relates to the technical field of oil cylinder reciprocating motion equipment, in particular to an oil cylinder reciprocating motion limiting mechanism, a baffle on a pull rod is modified into a convex ring, a long groove does not need to be milled in a sleeve, sundries cannot enter the sleeve, the pull rod is not prone to bending, the sleeve is easy and convenient to machine, the convex ring is round and runs on a smooth inner wall, and abrasion and damage are reduced.