Corn is the grain and feed crop with the largest planting area and the highest yield in Ningxia.Saline-alkali stress is an important factor affecting the high and stable yield of maize.Research on the molecular biological mechanism of saline-alkali tolerance,new germplasm creation and breeding is of great significance to ensure the sustainable production of maize in Ningxia.The genetic sites,gene resources and regulatory mechanisms of maize saline-alkali and stress resistance are discussed,maize genome sequencing,molecular biotechnology breeding and big data analysis techniques are summarized,to promote the genetic basis analysis of maize saline-alkali and stress resistance,genetic improvement and germplasm resource mining of salt-resistant maize.The current problems and challenges faced by maize saline-alkali resistance breeding are discussed.The strategies of saline-tolerant germplasm creation and breeding of maize are put forward.