Morphological diversity and clustering analysis of 50 cassava germplasm resources collected from 6 places in the Philippines country,Yunnan and Hainan provinces were analyzed with morphological markers.The results showed that among the morphological variation coefficient of cassava germplasm resources in Yunnan,vein color had the highest variation with 85.5%; the second was storage root concentration with 75.76%; the lowest was middle crack length with 9.33%.The middle of the crack length had the largest diversity index with 5.64 and the smallest one was rotten situation with 2.58.The average index was 5.34,overall showing a high genetic diversity.The results of clustering analysis showed that the genetic distance ranged from zero to 1.22,with the average of 0.80.The genetic diversity between the materials tested was rich and the genetic difference was significant.Fifty cassava germplasm resources were divided into 6 categories at Euclidean distance of 1.00.Clade Ⅰis consisted of 33 materials,9 of them had high starch content and 8 of them had high fresh root weight.Among them SC11 had the highest starch content of 36.7% with special leaves.Clade Ⅱ included 12 materials with low starch content,3 of them had high fresh weight.Clade Ⅲwas made up of 2 materials mainly with high fresh root weight.Clade Ⅳ material F876 had higher starch content of 29.78% and highest fresh root yield of 238.5 t/hm2.Clade Ⅴ material GR024-7 had higher fresh root yield of 145.5 t/hm2.Clade Ⅵ was material H502.The genetic relationship was the closest between S4 and E361,followed by F556 and F821.F876,GR024 and H502 were far from other germplasm,although GR024 and H502 had close genetic relationship and similar characters.It will provide the reference for selecting cassava breeding parent and promoting the utilization/innovation of cassava germplasm resources in Yunnan Province.