The invention discloses a backlight module backplane and circuit board fixing structure as well as a forming method thereof. The backlight module backplane and circuit board fixing structure comprises a backplane, wherein convex hull structures used for fixing a circuit board are arranged on the backplane; the lateral surface of each convex hull structure comprises one arc-shaped surfaces and two planes; the top surface of each convex hull structure is a circular plane; a threaded hole is formed in the top surface of each convex hull structure; and as the lateral surface of each convex hull structure comprises one arc-shaped surfaces and two planes, the occupied space of the convex hull structure is relatively small. The backlight module backplane and circuit board fixing structure as well as the forming method have the advantages that not only is the structure simple, but also the problem that the safe distance between component pins under the circuit board and the convex hull structures is not enough can be solved, and the system costs of the backplane and the circuit board can be reduced.