The utility model provides a rotation support fixed knot of fastener constructs, its including relative set up decide arm and swing arm, be equipped with the stria of adaptation respectively on deciding arm and swing arm, and decide whole " L " the structure that appears of the continuous formation of stria on arm and the swing arm, it links to each other as the elasticity pivot through " one " font spring leaf to decide arm and swing arm, the elasticity pivot sets up in " L " shape structure stria wherein on one side, installs the holding piece of adaptation respectively deciding the two front end of arm, swing arm, it can drive corresponding holding piece around elasticity pivoted rotating and be close to or keep away from the holding piece of deciding on the arm to move upper -arm circumference. This rotation support fixed knot of fastener constructs has can eliminate frictional force, make the long -term uniformity of fastener obtain the advantage of guaranteeing.