Soils have close connection with landscapes, diagnostic horizons and characteristics are the base for determining soil types in soil taxonomy. It is helpful for soil survey to study the relationship between landscapes and diagnostic horizons and characteristics. In this paper, under the guidance of the landscape, we carried out the survey of soil series in a small scale area in Jurong county of Jiangsu Province, 48 main profiles were classified into 4 soil orders (Anthrosols, Luvisols, Cambisols and Entisols), 4 suborders, 9 groups, 13 subgroups. Based on the survey, we explored diagnostic horizons and characteristics relationship with landscapes, and found that landscape can well indicate some diagnostic horizons and characteristics, the in-depth study of landscape can guide soil investigation and determine soil types.