‘Suzhen No.2’ is a F₁ hybrid of pumpkin type watermelon special rootstock，developed by crossing inbred line 15S-32 （Cucurbita maxcima） from India as female parent and 15S-27（Cucurbita maxcima）from India as male parent．This rootstock germinated in order and has light green and thick strong stalk．Its medullar cavity is solid．The cotyledons are open and flat，and of moderate size．It is easy to operate grafting．Its grafting has good compatibility，high survival rate，and high resistance to watermelon Fusarium wilt．In fields，its resistance to vine blight is stronger than that of the contrast‘ Jingxinzhen No.4’．In early stage，it is tolerant to cold and in late stage，its heat tolerance is prominent．The grafted seedlings will not get premature senility in late growth stage．It is easy to set fruit and has better yield increasing effect，averagely over 12.3%．It has less influence on fruit quality，but can increase the central sugar content in fruit．Its comprehensive properties are good．It is suitable for grafted cultivation in early spring in Jiangsu Province and similar areas．