Side light type backlight source with high heat dissipation performance

The utility model discloses an edge-lit backlight source with high heat dissipation performance, which comprises a metal bottom plate provided with supporting legs, a guide column arranged on the upper end face of the metal bottom plate, a threaded hole arranged on the end portion of the guide column, a square boss distributed on the upper end face of the metal bottom plate, and heat dissipation needles distributed on the lower end face of the metal bottom plate. The light guide plate is arranged on the upper end face of the metal bottom plate and provided with a first mounting hole, the guidecolumn is inserted into the first mounting hole, one side face of the light guide plate is provided with a lamp holder groove, and square concave platforms are distributed on the lower end face of the light guide plate; the light source is arranged on the light guide plate and comprises lamp beads and pins; the reflecting film is attached to the upper end face of the light guide plate and coversthe lamp holder groove, an