The effect of dry wet cycle time ratio(3∶1 and 854∶1) and exposure time(30,90d) on chloride resistance of strain hardening cementitious composites(SHCC) was investigated through the artificially simulated marine tidal zone test. Combined with the classical Ficks second law, the time dependent behaviors of the surface chloride content and diffusion coefficient were further analyzed. The results indicate that the mechanism of dry wet cycles has a significant influence on the behavior of chloride ingress into concrete. The time varying behavior of surface chloride content conforms to the variation of inverse model. The apparent chloride diffusion coefficient is markedly greater than that of instantaneous coefficient, and the age attenuation coefficient of SHCC is greater than that of C30 ordinary concrete.