The invention discloses a light emitting diode with a reflector protective layer. The light emitting diode comprises an N-type electrode, an N-type semiconductor layer, a light emitting layer, a P-type semiconductor layer, a metal reflecting layer, the protective layer, a buffering layer, a combination layer, a permanent substrate and a P-type electrode, wherein the N-type electrode, the N-type semiconductor layer, the light emitting layer, the P-type semiconductor layer, the metal reflecting layer, the protective layer, the buffering layer, the combination layer, the permanent substrate and the P-type electrode are sequentially stacked, the protective layer is made of metallic oxide and forms a hollowed frame pattern, the edge of the metal reflecting layer is covered or supported with the frame pattern, therefore, the metal reflecting layer can be protected through surrounding and shielding of the protective layer and prevented from being oxidized in the follow-up manufacturing process, the deserved reflectivity of the metal reflecting layer can be maintained, and accordingly the light emitting efficiency and the electrical stability of the light emitting diode are improved.