Salt stress seriously affects plant growth and is a serious factor restricting the safe production of crops.? High salt can cause disturbance of ions in plants, and ultimately affect the development, growth and yield of plants.?It is very important to understand and improve the salt resistance mechanism of crops to ensure the safe production of crops.?In this paper, the harm of salt stress on plants, sodium ion transport, and the response mechanism of plants to salt stress were reviewed.?The aim is to provide some theoretical basis for promoting the study of the responding mechanisms of salt stress in plants.