The present invention discloses a reflective four-in-one luminous key core module. The insulating layer in the luminous key core module is arranged on a supporting structure, the circuit layer is arranged on the insulating layer, a switch is arranged on the circuit layer at a position corresponding to the keycap, the spacer layer is arranged above the insulating layer, a first through hole is opened on the spacer layer at a position corresponding to the keycap, an elastic conductive member is arranged at the position corresponding to the first through hole, a
light guide film is arranged above the spacer layer, a conductive sheet is fixedly arranged below the
light guide film at a position corresponding to the elastic conductive member, the conductive sheet is arranged corresponding to the first through hole, a
light guide point is arranged on the light guide film at a position corresponding to the keycap, an
LED lamp is installed on the circuit layer and arranged corresponding to the keycap, a second through hole is opened on the spacer layer at a position corresponding to the
LED lamp, a third through hole is opened on the light guide film at the position corresponding to the
LED lamp, the LED lamp is installed in the second through hole and the third through hole, and the keycap is arranged above the elastic conductive member.