Abstract： The genetic performance and characteristics of CA male sterile oat materials have indicated that the male sterility is controlled by a pair of recessive genes. The original CA male sterile oat has been genetically improved, and selection procedures for different types of male sterile materials were designed, Meanwhile, a new genetic population with unique traits and higher proportion sterility has been obtained by using male sterile oat lines. A novel technique for oat hybridization by using the new sterile lines has been established, and breeding populations with high-thousand-grain-weight, high-protein, low-fat, high-yield, disease-resistant traits have been constructed with abundant genetic basis though this technique.