The invention discloses a prismatic lens assembly and a backlight source. The prismatic lens assembly comprises at leas two layers of prismatic lenses and bonding materials filled between bonding regions, wherein surface, adjacent to the adjacent prismatic lens, of each adjacent prismatic lens is a bonding surface which comprises the bonding regions, and the backlight source comprises the prismatic lens assembly. According to the prismatic lens assembly and the backlight source, the prismatic lens assembly comprises at leas two layers of the prismatic lenses and the bonding materials filled between the bonding regions, the surface, adjacent to the adjacent prismatic lens, of each adjacent prismatic lens is the bonding surface which comprises the bonding regions, and the backlight source comprises the prismatic lens assembly. Accordingly, by means of the bonding regions and the bonding materials, the bonding area is enlarged, bonding between the adjacent lenses of the prismatic lens assembly is firmer, the disengagement probability of the prismatic lenses is reduced, and therefore the service life of the backlight source which comprises the prismatic lens assembly is prolonged.