The invention is one kind for the LED head lamp and the chimney, it the LED head lamp chimney's outside top according to the specific front light laws and regulations stipulation light, forms an asymmetrical graph, makes in the LED head lamp the photo source then to tally by this chimney the photo source light revision this laws and regulations stipulation light, the structure is quite simple, shrinks effectively extinguishes the volume, will be suitable in the future AFS headlight's application.