Light guide plate and backlight module

A light guide plate with multidirectional structures is described, which includes a main body, a plurality of first microstructures and a plurality of second microstructures. The main body includes a light-incident surface, a light-emitting surface and a reflecting surface. The reflecting surface is opposite to the light-emitting surface. The light-incident surface connects the light-emitting surface and the reflecting surface. The first microstructures are disposed on the light-emitting surface or the reflecting surface and arranged along a first extending direction. The second microstructures are disposed on the light-emitting surface or the reflecting surface and arranged along a second extending direction. The second microstructures and the first microstructures are disposed on the same plane and intersect with each other. Each of the second microstructures is a single strip, and a width of each second microstructure is getting smaller from one end at the light-emitting surface to the other end away from