Abstract: As a new type of curing method, spraying curing agent is being gradually applied in concrete engineering. In this paper，through the optimization of components, the concrete curing agent based on polymer emulsion with high moisture retention rate and fast film forming on fresh concrete surface is prepared. The effects of curing methods (i.e. standard curing, drying curing and curing with curing agent) on strength, durability and plastic shrinkage and cracking of concrete are studied, then the curing agent is applied in arid-sandy area. The results indicated that compared with standard curing, the strength of concrete with curing agent is not reduced before 7d, and only reduced by about 5% at the age of 56d, natural carbonation depth of concrete with curing agent is equal to zero at the age of 90d, but the chloride ion permeability of concrete slightly increased up to 30%. Besides, compared with other curing methods, curing agent can effectively reduce the plastic shrinkage and cracking of concrete, and has significantly technical and economical advantages in arid-sandy area.