The agronomic traits of 8016 accessions of Panicum miliaceum were investigated.Using 11 traits including plant height,1000-grain weight,growth period,etc.,principal components and cluster analysis were performed.The cumulative proportion of the first eight of principal components achieved 86.44%.All these accessions were divided into 5 groups.Each group has specifically morphological traits.The group 4,including 1301 accessions,had more number of main stems,more yield per plant and more 1000-grain weight indicating that germplasms in group 4 have better morphological traits.