The invention relates to the field of the light-emitting technology, particularly relates to a light-emitting component, a backlight and a display panel, and solves the bad image display due to the light intensity difference between a gap position, located between two adjacent light-emitting diodes, and a light-emitting position in the related technology. The embodiment of the invention provides alight-emitting component, which comprises a circuit board and a plurality of light-emitting diodes arranged on the circuit board; each light-emitting diode comprises a master light-emitting surface that is parallel to the circuit board, and a lateral light-emitting surface that is arranged obliquely; the lateral light-emitting surface faces to the circuit board; and, a reflective film for reflecting the light emitted by the lateral light-emitting surface is arranged on the circuit board. The light-emitting component provided by the embodiment of the invention is used for producing and manufacturing the backlight.