Display module assembly jig and display device

The utility model provides a display module assembly jig and a display device, the display module assembly jig comprises: a jig platform, which comprises an installation position for placing a display panel, and positioning rods arranged around the three surfaces of the installation position, so that the display panel is over-limited through the positioning rods after being placed at the installation position, and the display panel is prevented from being damaged. And displacement of the display panel during installation with the circuit board is prevented. The side, without the positioning rod, of the mounting position comprises an assembling position, and a notch is formed in the side wall of the assembling position; therefore, the auxiliary mounting plate can be conveniently mounted on the jig platform through the notch, and the display panel and the circuit board can be conveniently assembled. A positioning groove is formed in one side of the auxiliary mounting plate, connecting pieces are arranged at the two ends of the auxiliary mounting plate, and the connecting pieces penetrate through the notches and are rotationally arranged relative to the notches, so that the auxiliary mounting plate rotates to mount the circuit board on the back face of the display panel; the circuit board is mounted on the back of the display panel by rotating the auxiliary mounting plate, so that the back of the display panel is avoided, and the risk of screen breakage is reduced.