Abstract: Four strains used as female parents were crossed with 8 selflines separately, 26 triple hybrids were obtained. The variation degree of main characters, diferent significan ce of triple hybrids, the relevance of fruit shape betwen the triple hybrids and its parents’ were all analysed．The results show:the variation degree of fruit mass of triple hybrids Was the biggest(variation coefficient was 15-28)；then was the sugar (5-16)；the fruit shape was relatively stable (<10)，the diference of its variation degree and the double hybrids was not
significant，the fruit shape of the triple hybrids was relevan t with its male parent； the variation degre of blossom stage in the same triple hybrid Was very small.

Key words: Muskmelon, Triple hybrid, Variation coefficient, Diference, Relevance