The utility model discloses a caliper piston inside lining anchor clamps, its characteristics are: including body and pull rod, the axle center of body is the hollow cylinder, is provided with on the body to keep off the seat, the right -hand member of body is interfacing in the columniform, and the inside lining is overhead has offered a plurality of wire casings, and the tip of wire casing is provided with the through -hole that the diameter is greater than the wire casing width, the right -hand member of interior interfacing be provided with conically and with the hole groove of body with the axle center, the pull rod alternates in the hollow cylinder of body, and the hole inslot is provided with the conical head that rises, the right -hand member the spiro union first and pull rod that rises, and the left end of pull rod is connecting portion, is provided with the screw on the connecting portion. The utility model discloses an interior interfacing can be filled in in caliper piston's a section of thick bamboo, utilizes the pull rod and the head that rises to make interior interfacing rise greatly to consequently centre gripping caliper piston can not harm caliper piston's surface, convenient operation moreover, and machining efficiency is high.