The invention discloses a jointing positioning jig for a touch screen assembly. The jointing positioning jig comprises a jig body, wherein a square groove which is matched with a display screen module and a TP (Touch Panel) module from bottom to top in sequence is formed; the four corners of the square groove are provided with arc-shaped gaps which are used for preventing the four corners of the assembly from being rubbed and collided with the jig in an jointing process; the short edges of two sides of the bottom of the square groove are provided with cushion blocks which are of equal heights and used for preventing the display screen module from being contacted and rubbed with the positioning jig on a large area, so that damages are reduced; and each long edge side of the square groove is provided with a square gap which is formed integrally with the square groove, so that a jointed assembly is convenient to take out. The jointing positioning jig for the touch screen assembly provided by the invention has the advantages of low cost, simple structure, convenience in use, accurate positioning and improvement on the product quality.