Lamp bead lens, LED flexible lamp strip and backlight module

The utility model discloses a lamp bead lens, an LED flexible lamp strip and a backlight module. The lamp bead lens comprises a lens body, the top of the lens body is provided with a light-out surface, the bottom of the lens body is provided with a light-in hole, a light-in surface is arranged around the light-in hole, flat feet or a plurality of column feet are uniformly arranged at the position of the light-in surface, and when the plurality of column feet are arranged at the position of the light-in surface, the column feet are distributed in a square shape around the center of the light-in hole. According to the lamp bead lens disclosed by the utility model, the flat foot or the plurality of column feet are arranged at the position of the light incident surface, so that the lamp strip width of the LED flexible lamp strip can be effectively reduced and the manufacturing cost of the LED flexible lamp strip can be reduced regardless of the flat foot or the column feet with equal distances to the central poin