The invention belongs to the technical field of architectural engineering for roads and bridges, and particularly relates to a maintenance device of an anti-collision wall for roads and bridges. The device includes a lifting platform, a water storage barrel, an automatic water supplementing structure and a spraying pipe; the water storage barrel is arranged above the lifting platform, the inner cavity of the lower portion of the water storage barrel is communicated with the spraying pipe through a waterflow valve, and the spraying pipe is of a long-rod-shaped pipe structure in which water spraying holes are evenly formed; the automatic water supplementing structure for introducing an external water source is installed in the water storage barrel. The maintenance device has the advantages that the problems can be solved that continuity of concrete maintenance work is poor, water for maintenance is wasted, concrete is cracked, and it is difficult to achieve the maintenance effect on theanti-collision wall; the improvement of construction efficiency is facilitated, the cost is reduced, the construction quality is ensured, a preparation method of the devices is easy, the cost is low,the pertinence is high, and the maintenance device can be used circularly and is convenient to popularize.