Abstract: In order to screen out the high quality potato lines suitable for the third and fourth accumulative temperate zone in Heilongjiang Province, Kexin 4,Kexin 13 and Kexin 22 were used as control varieties respectively, 17 potato lines introduced from different scientific research institutions in the province were used as test lines, and the comparative analysis was carried out from the aspects of growth period, morphological characters, disease resistance and yield.The results showed that there were differences in morphological characters among the tested lines.Test lines sld01 and sly01 were early maturing lines, and their tuber quality and yield were higher than those of the control variety Kexin 4.Test lines sly03 and sly04 were late maturing lines, and their tuber quality and yield were better than those of the control variety Kexin 13.Through comprehensive consideration, four potato materials, sld01,sly01,sly03 and sly04,could be further demonstrated in Suiling area.