The invention provides a cleaning maintenance device for an outdoor steel 
structural component internally provided with an 
LED lamp. The cleaning maintenance device for the outdoor steel 
structural component internally provided with the 
LED lamp is used for conducting cleaning maintenance on the outdoor steel 
structural component. The outdoor steel structural component comprises a main beam (4) provided with a guide rib (2) which extends longitudinally and auxiliary girders (41) supported on the main beam (4); the cleaning maintenance device comprises a support frame (99), a 
water supply pipe (61) which is supported on the support frame (99) and is close to the main beam (4) and a 
nozzle (62) communicated with the 
water supply pipe (61); and the upper surface and the lower surface of the guide rib (2) are each provided with multiple guide protrusions which extend longitudinally, and therefore the guide rib (2) can be matched with circumferential grooves (920) and circumferential grooves (910), formed in an upper support rolling wheel (921) and a lower support rolling wheel (911) which are matched with the upper surface and the lower surface of the guide rib (2), of the cleaning maintenance device.