In this field experiment, three potato varieties of Favorita, Ziyu and Jizhangshu–12 were used as material, five light treatments (45% shading in certain growth stage, 45% shading in the whole growth stage, 70% shading in certain growth stage, 70% shading in the whole growth stage, no shading as control) were conducted to study the effects of different light treatments on growth dynamic, yield and its components of potato varieties by measuring plant height, dry matter, the content of starch in tuber,tuber numbers per plant, tuber yield and ot...