A light guide plate, a dual-view backlight module having the light guide plate and a dual-view display device having the dual-view backlight module are provided. A lower surface of the light guide plate includes at least one V-shaped groove configured to reflect a light ray, which is incident onto the lower surface of the light guide plate from sides thereof, onto an upper surface of the light guide plate by sides of the at least one V-shaped groove, the reflected light ray leaving the light guide plate from the upper surface thereof. The V-shaped groove on the light guide plate refracts the light from the two sides of the V-shaped groove, so that the light leaving the upper surface of the light guide plate can form dual-view backlight with a good brightness enhancement effect and a dual-view display having a high brightness can be manufactured.