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The study was to screen forage oat ( Avena sativa) varieties (lines) suitable for planting and utilization in Chongqing. The experiment studied the production performance, nutritional quality and disease resistance of 19 oat varieties, and used the grey correlation method for comprehensive evaluation. The results showed that Qingmu No.3 had the highest hay yield (1.26 kg/m²), which was significantly higher than other varieties except Baiyan No. 3 and other nine varieties ( P<0.05). The nutrient composition analysis showed that the variation of crude protein content was the largest (27.23%), among which Qingyin 2 had the highest crude protein content (21.87%), and the average crude protein of 19 varieties was 13.52%. Disease resistance analysis showed that high resistance varieties (HR) were Taike and Dahan, and eight varieties with disease resistance grade or above, and no rust immune varieties were found. The oat varieties with better performance were screened out by the comprehensive evaluation of grey relational degree method: Kanyan No. 4, Baiyan No. 3, Qingmu No. 3. The study indicates that Kanyan 4, Baiyan 3 and Qingmu 3 are suitable for promotion and utilization in Chongqing area. [ABSTRACT FROM AUTHOR]