It refers to the use of external heat source heating curing of concrete, usually has the following five methods, one is hot water spray curing: is the use of hot water (less than 80℃) on the formed concrete regularly spray, curing, so that the concrete reached a higher temperature and humidity, promote the strength of concrete growth; The second is steam curing: it is the use of hot steam heating curing concrete, so that the formed concrete to get a higher temperature and humidity, promote hydration solidification and concrete strength growth