Backlight module and display device

A backlight module comprising a backplane and a plurality of backlight parts provided on the backplane, in which a seam is provided between the two adjacent backlight parts, wherein

• an adjustment part is installed at the seam, the adjustment part comprising:
• a connecting portion, an end of which is installed on the backplane through the seam;
• and
• an adjustment portion provided at an end of the connecting portion away from the backplane, in which an outer diameter of the adjustment portion tapers along a direction toward the backplane, an end of the adjustment portion enters the seam, a degree to which the adjustment portion enters the seam is adjusted by adjusting a depth at which the connecting portion is installed in the backplane, and a width of the seam is adjusted by adjusting the degree to which the adjustment portion enters the seam.