Abstract: To determine the effect of ultrasonic treatment on buckwheat sprouts,the common buckwheat seeds were pretreated with ultrasonic in different time. The germination rate,as well as the content of water,soluble sugar,crude protein,phenolic composition and total flavonoids were determined. Meanwhile,their antioxidant activities( reducing power and DPPH radical scavenging activity) were determined and then compared.The results showed that a certain time( 10~20min) treatment could promote germination rate,all the determined nutritional composition and the antioxidant activities.The treatment with 20 min had the best antioxidant results with the total phenol content was up to 180.8μg GAE/m L,the total flavonoids content was 156.701 mg rutin/g sample and the DPPH radical scavenging activity had a maximum value.Meanwhile,the treatment also increased the germination rate,which was94%.Therefore,a proper and short-time ultrasonic treatment do well to the germination and antioxidant activity.