Abstract: A racket string bracing apparatus including a base having a column sleeve at one end and a U-shaped upright support at an opposite end, a work table turned about the column sleeve, internal racket frame holders and external racket frame holders respectively mounted on the work table to hold down the racket frame to be strung, a string bracing mechanism mounted on the upright support and controlled to brace the string, wherein a pawl and a gear are mounted in the string bracing mechanism to prohibit it from reverse rotation; each of the external racket frame holders includes a slide slidably mounted on the work table and fixed in place by a tightening up screw, a transverse sleeve welded to the slide, two horizontal extension bars respectively and longitudinally slidably inserted into two opposite ends of the transverse sleeve and fixed in place by a respective tightening up screw, and two stop rods respectively perpendicularly fastened to the horizontal extension bars at respective locations remote from the t