[Objectives] Several perennial flowers were planted in the present study to explore the effects of different perennial flowers on salt and nutrients in saline soils of the Yellow River Delta.[Methods] The soils planted with Iris lactea, Pennisetum alopecuroides ' Purple ', Dianthus plumarius, Gaillardia pulchella, Hemerocallis hybrida and Sedum spectabile were measured to reveal the effects of perennial flowers planting on the soil salt content, electrical conductivity, Na+,Cl-, available potassium, and available phosphorus content were analyzed. [Results] ①The results showed that perennial flowers planting had ecological regulation effect on saline soil in the Yellow River Delta. Among them, I. lactea and P. alopecuroides significantly reduced the salt content in the 0-10 cm and 0-20 cm soils, respectively. ②The contents of Na+and Cl-in the 0-10 cm soils were significantly reduced by G. pulchella and D. plumarius, the removal effect of soil Cl- by Iris lactea and G. pulchella was significant. ③Perennial flowers had no significant effect on the content of available potassium in topsoil but reduced the content of available phosphorus in the 10-20 cm soils except P. alopecuroides. [Conclusions] The improvement effects on saline soil of I. lacteal and P. alopecuroides were better than Hemerocallis hybrid, and the effects of D. plumarius, G. Pulchella and S. spectabile on saline soil were negligible. The results of this study help to select suitable perennial flowers for ecological improvement of saline soil in the Yellow River Delta.