After concrete pouring, 12h should be covered with water. Hard concrete should be cured immediately after pouring. The concrete surface should be covered with materials with strong water absorption capacity. Such as sacks and mats. When plastic film is used for curing, all exposed parts of concrete are covered tightly with plastic sheets to ensure that there is condensed water in the plastic sheets, so as to achieve the purpose of wet curing. Spraying plastic film curing solution can be used for the maintenance of water-deficient areas and high-rise buildings that are not easy to water. That is, the curing liquid is sprayed on the concrete surface with a spray gun, and a plastic film is formed on the concrete surface after the solution volatilizes, so that the concrete is isolated from the air and the water in it is prevented from evaporating, thus ensuring normal hydration.