In this paper, we characterize the nonlinear optical properties of copper chlorophyllin sodium salt solution and and mixed solution with sodium chloride, which provides some reference value for underwater laser communication, high intensity laser underwater detection, and other applications of intense light. In this study, the optical nonlinear effects of pure water and copper chlorophyll-sodium salt solution mixed with sodium chloride at 532 nm were measured by z-scanning technique. It is found that the optical nonlinear effect of copper chlorophyllin sodium salts increases with increaseing the concentration. However, when mixed with sodium chloridesolution, there is a distinct nonlinear anti-saturation absorption. Therefore, this hybrid material is a very good optical limiting material.