The present invention relates to a golf swing practice assisting device that can practice to rotate a user's torso before his arm, a leg unit worn on the user's leg; and an arm unit connected to the leg unit and worn on a user's arm, wherein the leg unit includes: a body case; a first magnetic detachment unit fixed to an inner end of the body case; a second magnetic detachable portion formed inside the main body case and detachably attached to and detached from the first magnetic detachable portion by magnetic force; a stopper formed inside the main body case and limiting the movement distance when the second magnetically detachable portion is separated from the first magnetically detached portion and moves; A main spring formed inside the main body case and extending and contracting by connecting the second magnetically detachable part and one end - the main spring and the second magnetically detachable part are connected to each other by a connecting part, and the connecting part passes through the stopper The second magnetic desorption unit and the main spring are placed on both sides around the stopper; a bracket formed inside the body case and coupled to the other end of the main spring; a first wire connecting the bracket and the arm unit to each other, wherein the first wire transmits an external force according to the movement of the arm unit to the bracket; and a second wire having one end coupled to the connection part and extending through the inside of the main spring and the bracket, the second wire includes a sleeve at the other end to limit the moving distance of the bracket. , When the user rotates the body before the arm during the downswing in the backswing top, the second magnetically detachable part is separated from the first magnetically detachable part to generate a sound while colliding with the stopper, golf swing practice to provide auxiliary devices.
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