Abstract:Two medium-late maturing and one early maturing new varieties (line) of potato have been bred by sexual hybridization among varieties with convcntional breeding way. Medium-late maturing new vanety "Chunshu No.3" and early maturing new line "Chunshu No.3-1" are characterized by fresh edibles, starch and fried potato pieces. "Chunshu No.4" is a late maturing new variety with Characteristics of fresh edibles, starch and maintain fresh after peeled (salad, potato sauce and quick-frozen potato pieces et al.).