The invention belongs to the field of road warning, and particularly relates to a height limit reminding device for road warning. The height limit reminding device for road warning comprises a base, alarm mechanisms, a transmission board mechanism, a limit mechanism and the like, wherein the two alarm mechanisms are symmetrically installed on both sides of a vehicle entry place of the base. According to the height limit reminding device for road warning, a warning can be automatically issued in advance before an ultra-high vehicle reaches a height limit bar, a driver is reminded that the vehicle exceeds the height range limited by the front height limit bar, the driver is warned not to move forward any more after passing through the height limit reminding device, the damage of the vehicle,the height limit bar and the other public facilities caused by the forward passing through the height limit bar is avoided, so that the occurrence of traffic accidents caused by superelevation afterthe ultra-high vehicle enters the relevant road section is avoided, and safety hidden dangers caused by the ultra-high vehicle running on key road sections are eliminated.