In order to study the removal effect of improved permeable pavement, which is suitable for weak permeable soil quality, on typical rainwater runoff pollutant suspended solids(SS), a test device with silty clay of Jiaxing City as soil base layer was made, and the effect of improved permeable pavement device on reducing SS of runoff pollutants under different rainfall recurrence periods was simulated and tested by a method of artificial simulation of rainfall, and a comparison with conventional permeable paving device and ordinary paving device was made. The results show that smaller rainfall recurrence period is more conducive to SS removal by permeable pavement, and in the process of SS removal by improved permeable pavement under weak permeable soil conditions, not only the removal rate is higher than that of conventional pervious pavement, but also the removal speed is also strengthened. Under the condition of 1 year rainfall recurrence period, on average, the improved permeable pavement removes 29.82% more SS pollutants per minute than the conventional permeable pavement.