Abstract：In order to provide theoretical basis for germplasm development and quality breeding of arrowhead（Sagittaria sagittifolia L.），the quality traits of corm in 100 arrowhead germplasm，conserved in Wuhan National Germplasm Repository for Aquatic Vegetables，were tested．The normal distribution，pearson correlation and cluster were analyzed．The results indicated that the average dry matter content was 30.87%，ranging from 23.55%-38.82%．The average starch content was 16.36%，ranging from 11.44%-22.58%．The average crude protein content was 4.67%，ranging from 2.89%- 6.98%．The average soluble sugar content was 2.67%，ranging from 1.55%-3.94%．The distribution of dry matter content，soluble sugar content and starch content are normal，but the distribution of crude protein content is not normal．The accession number of high dry matter content and high starch content is higher than the others．The dry matter content is very significantly positive correlated with the crude protein content，and so is the soluble sugar content with the starch content．While the crude protein content is very significantly negative correlated with the soluble sugar content and starch content．The soluble sugar content is significantly negative correlated with the starch content．The 100 arrowhead germplasm resources are divided into 5 categories according to their quality traits．In the 1st group，all quality traits contents are lower．In the 2nd group，only the crude protein content is higher．In the 3rd group，the soluble sugar content is the highest．In the 4th group，the crude protein content is the highest．In the 5th group，the dry matter content and starch content are the highest．
