‘Taiqi No.1’ is a new cultivar of Chinese water chestnut，selected and bred from the mutant strains of tissue culture plantlets of‘ Diantoubiqi’．This new cultivar has medium plant type with vigorous growth and strong ramet producing ability．It can yield 142.6 corms per square meter．The average single corm weight is 27.31 g．Its average yield can be 37.97 t ·hm-2．The yields between years are stable．It takes 150-160 days as the whole growing period．It is of late maturity．Its optimal harvest period is from December 20 to end of January of next year．It has superior quality with sweet，refreshing taste，crisp-tender pulp and less dregs．Its comprehensive performance is good．It is medium resistant to stem blight and Fusarium wilt．It is suitable to be planted in Zhejiang Province and surrounding provinces．