The utility model discloses a handle switch with control gap function, include the last casing and lower casing connected through fastening bolt, it is equipped with relative arc recess with lower casing to go up the casing, the internal locating pin that is equipped with of inferior valve, it is inside and outside cavity with the partition of arc recess upward to be equipped with the baffle use respectively in casing and the lower casing arc recess, the face middle part that two baffles are relative is half -circular arc in order to hold the direction to the pipe tightly when foling, form the breach between the baffle one end on last casing or the lower casing and the side of place casing, so that but this end relief of baffle becomes the free end that the pressurized removed. The utility model discloses a set up deformable free end and make the pilot hole change to compress tightly the orientation and damage pipe and difficult the emergence on the baffle, can effective control gap size, make and prevent that rotatory and control gap can reach the effect of ideal simultaneously, still prevent effectively through setting up the strengthening rib that the baffle is out of shape serious fracture even when the atress, can also reach the effect that does not influence casing and the fitting surface gap of lower casing simultaneously.