The tests of distinctiveness, uniformity, and stability(DUS) are necessary steps for varieties identifing and new varietis applying. 21 SRAP markers and 54 morphological traits for DUS tests were used for diversity analysis of 28 watermelon(Citrullus lanatus) varieties. Average polymorphism information content(PIC) of the SRAP markers was 0.72, ranging from 0.525 to 0.892 and the correlation coefficients of varieties ranging from 0.92 to 0.99. The correlation coefficients range from 0.50 to 0.85 in morphological traits test. Clusters analysis of the band patterns using UPGMA analysis separated the varieties to four (SRAP markers) and five (morphological) groups, showing certainsimilarity with in them.The correlation coefficient of two markers is 0.218, showing of no significance correlation. But the SRAP markers show some advantages in varieties identification that could be a good supplement for DUS test .