Saline soil has a large area and wide distribution in the world. In recent years, the process of soil salinization has been accelerated under the comprehensive action of natural and man-made factors. Soil salinization has serious adverse effects on soil environment and crop growing. So the study of saline soil improvement is particularly important to improve soil environment and increase crop productivity. China's saline soil occupies nearly one tenth of the world's saline soil area. Reclamation of saline soil and prevention of soil salinization have become the top priority of agricultural sustainable development in China. Therefore, taking appropriate and cost-effective measures to alleviate the impact of saline soil on crop growth has become an important need for the development of agricultural technology in China. This paper summarizes the characteristics of saline soil. Then the improvement measures of salinized soil are summarized from three aspects: salt reduction measures, improvement and fertilization measures, biological response measures. This study hope to provide theoretical support for further research on salinized soil amelioration.