The utility model discloses an outer thread processing's of tubular product interior strutting arrangement, including the jackscrew, fixed disk body, spacing sleeve, the voussoir, cone and supporter,fixed disk body passes through fastening bolt and the nut is connected with spacing sleeve, the cone is located spacing sleeve, it has the rectangular hole to open on spacing sleeve's the section of thick bamboo wall, the one end of voussoir is the inclined plane, and insert the rectangular hole and with the inclined plane sliding fit of cone, the other end and the supporter of voussoir are connected, the last surface curvature of supporter is the same with pipe inner wall's camber, jackscrew and fixed disk body threaded connection, elongation voussoir and the rectangular hole up -and -down motion of supporter along spacing sleeve through the adjustment jackscrew, during the supporter upward movement, the supporter contacts with the inner wall of tubular product, and production contact force. The device is at oil jacket tubular product external screw thread critical dimension sample processing in -process, can prevent that tubular product from because of outside clamping -force leads to elastic deformation, having improved external screw thread critical dimension sample processing's qualification rate.