A backlight module and a display device are disclosed. The backlight module includes a ring light-guiding body and a light source, wherein the ring light-guiding body includes a first side close to an axis and a second side away from the axis, light generated by the light source is emitted from the second side away from the axis of the ring light-guiding body. Light emission over 360-degree circumference can be achieved by the backlight module. Display over 360-degree circumference can be achieved by the display device including the backlight module.