The invention discloses a circular ring test-based method used for evaluating concrete thermal fracture, and more specifically relates to a laboratory test method used for analyzing and evaluating characteristics of concrete when fracture of concrete is induced by the action of temperature load. The laboratory test method is proposed based on the prior art, invar steel which is extremely low in linear expansion coefficient is used for providing concrete with internal constraint, a concrete temperature and humidity curing box and an acoustic emission device are adopted, and observing on the fracture phenomenon of concrete in heat-sink cooling process under internal constraint is realized. The circular ring test-based method is simple, and is suitable to be used for studying concrete thermal fracture characteristics, and the circular ring test-based method can be used for comparing thermal fracture resistance of different concretes and the same concrete at different ages.