In order to promote the usage of electron accelerator on preservation of fresh agricultural products,as well as to improve quality and extend preservation time of postharvest strawberry,electron beam irradiation was used to treat Fengxiang strawberry in this study.Irradiation dosage was 0.5 kGy,2.0 kGy,3.5 kGy and 5.0 kGy respectively,and its normal temperature storage qualities and the growth of microbes were measured.The results showed that electron beam irradiation could control microbes effectively with the dosage of 2.0-3.5 kGy,and prolong the preservation period by 2-6 days at 18-20 ℃ with best the hardness,water content,total soluble sugar,titratable acid and vitamin C(rot index<0.3).Irradiation of 5.0 kGy had best result on the microbes,but had some adverse effects on nutritional quality.Therefore,5.0 kGy was regarded as the highest limit dosage of electron beam irradiation on strawberry preservation.