Abstract: To study the early fracture properties of steam-cured concrete, three-point bending (TPB) specimens at different curing time (4 h, 8 h, 16 h, 24 h and 48 h) were tested, and the effects of the curing time on the mechanical and fracture properties of the steam-cured concrete were analyzed. Then, the relationship between fracture parameters and maturity was developed. Based on the digital image correlation (DIC) method, the full-field displacement and strain information of crack propagation were measured, and the damage evolution process of crack propagation was studied. The results indicate that the mechanical properties of steam-cured concrete increase with the curing time in 24 hours followed by a decrease tendency when the curing time is beyond 24 h. The fracture properties of steam-cured concrete increase significantly within 4~8 h of curing time and then rise slowly after 8 h. A good correlation between the fracture toughness and the maturity was observed to provide a basis for the fracture parameters of steam-cured concrete.