The invention relates to a lamp post with spraying and dust-falling functions. The lamp post with the spraying and dust-falling functions comprises a lamp post body, a spraying device, a water pipe and a water pump. The spraying device is installed at the upper end of the lamp post body and can adopt an automatic spraying head controlled by an electromagnetic valve. The bottom of the lamp post body is provided with a water pump. The water pipe is installed in the lamp post body. The water pipe is in sealing connection with the spraying device and the water pump. The water pump communicates with a tap water supply pipeline to form the lamp post with the spraying and dust-falling functions. The spraying function of the lamp post is opened in haze polluted weather, the pollutant concentration can be well reduced, the pollutant concentration at the high place can be reduced by means of the height of the lamp post, compared with a water cannon vehicle, the lamp post is more effective, the lamp post is wide in distribution, the coverage range is high, traffic jam pressure caused by low-speed driving of the water cannon vehicle on the road surface is prevented, and the manual cost is greatly saved.