The utility model provides a ball valve limit switch setting, includes limit switch fixed bolster, fixing bolt and limit switch, characterized by limit switch fixed bolster suit is on limit switch's outer wall to fasten with fixing bolt. The sealed limit switch setting of this ball valve is solved production and is overhauld the sealed requirement of injecing the switch mounting of on -the -spot ball valve, makes things convenient for the field force to use, improves and overhauls work efficiency, support personnel and equipment safety.