Abstract: In order to analyze the influences of freeze-thaw cycle on the crack resistance of styrene-butadiene-styrene (SBS) and crumb rubber (CR) modified asphalt mixtures, semicircle specimen flexural tensile tests were performed on salt solution freeze-thaw cycled and water solution freeze-thaw cycled modified asphalt mixtures firstly. At the same time, speckle images for the surfaces of specimens during the loading processes were processed using digital speckle correlation technique (DSCT), and the information of displacement field and strain field for the surfaces of the specimens changing with the load was extracted. Then, the crack resistance of asphalt mixtures was determined by analyzing the deformation field information and the results were compared with the fracture toughness test results. The results show that the horizontal strain is more suitable for the characteristic investigation on crack resistance of asphalt mixture. Both of the crack resistances for SBS and CR modified asphalt mixtures are degraded at some degree after freeze-thaw cycle, and the influence of salt solution freeze-thaw cycle on the crack resistance of asphalt mixture is greater than that of water solution freeze-thaw cycle according to horizontal strain-time curves. Compared with SBS modified asphalt mixture, the crack resistance of CR modified asphalt mixture is better. The conclusions obtained show that the analysis results of DSCT are consistent with the analysis results of fracture toughness tests, and indicates that it is feasible to evaluate the crack resistance of asphalt mixture adopting DSCT.