To obtain milk vetch phosphorus efficient use breed,phosphorus applied and non phosphorus applied treatments were set for nine milk vetch breeds (lines) for screening and identification.The results showed that:There were significant differences for the characters of 9 milk vetch breeds (lines); 84341022,Minzi No6,Zhezi 5-12 and 8487711 plants were upright,tall and stout which were significantly different from Xinyang breed,Yujiang large leaves and Yijiang seed; The numbers of branches of Xinyang breed,Yujiang large leaves and Yijiang seed were significantly more than those of the other varieties.The yield of seeds and fresh grass were used as indicators of phosphorus efficiency,together with tolerance of low phosphorus and breeds adaptability description,to screen Minzi No7 as high tolerance to low phosphorus breed (percentage of tolerance to low phosphorus was around 146.5%),both 8487711 and Minzi No7 as phosphorus efficient use breed (both comprehensive evaluation reached to the first level,namely 84.8% and 80.3%,respectively) as well as Yujiang large leaves as phosphorus sensitive genotypes (the yield was low when the soil was lack of phosphorus,but the yield increased significantly when phosphorus fertilizer was applied).It still takes consecutive many years to verify the breed stability and reliability of milk vetch phosphorus efficiency.The results could be used to provide scientific basis for the use of phosphorus efficiency milk vetch breeds in Southern China.