Abstract: In order to explore the accumulation characteristics and potential ecological risk assessment of soil cadmium in suburban farmland soils of Tianjin, cadmium contents of 330 soil samples collected from fields in four suburban areas of Tianjin were analyzed. Results showed that, in the four suburban areas, soil cadmium concentration was in the range of 0.07-3.89 mg/kg and was 0.33 mg/kg on average, indicating the soil was in an obvious cadmium accumulation degree. Soil cadmium variation coefficients in all the soil in Beichen area were in the range of 0.24-0.34. At the same time, the cadmium variation coefficients of vegetable field and dry land in Dongli and vegetable field and garden soil in Jinnan were higher than 0.9. Variance analysis showed that there was significant difference in the same land use type of different areas and different land use types of the same area. Hakanson potential ecological hazard index was used to calculate the potential ecological risk of different land use types in the four areas. In all the monitoring point, the results showed that 4% , 36.3% , 16.2%, 15.9% and 7.6% of the sampling points were at the potential risk level of light ecological risk level, medium risk level, strong risk level, very strong risk and extremely high ecological risk, respectively. Active measures should be taken to control and remedy polluted soil in areas above the strong ecological risk level.