Abstract: Abstract: 【Objective】 By means of plant community investigation based on greening technique of net-suspended spray seeding,the plant diversity and its influencing factors on three types of rocky slope were studied to provide scientific references for ecological management and vegetation restoration on rocky slopes in Jiangsu Province.【Method】 The soil nutrient index was calculated using a multivariate statistical analysis method. The gray relational degree was used to characterize the degree of coupling between slope plant diversity and soil factors. The relationships between slope plant diversity and environmental factors were analyzed by RDA.【Result】①In the plant communities of the three rocky slope types, plants from Rosaceae, Leguminosae, Oleaceae, Compositae and Gramineae accounted for 54.4% of the total species, indicating that these five families played the most important role in the eco-restoration. ②Plant diversity indices were significantly different among the different slope positions. The Margalef, Shannon-Wiener, Pielou and Simpson indices all showed a consistent trend, i.e., upper slope < middle slope < lower slope. The Margalef index indicated a sunny slope < shady slope tendency for the slope aspect. ③The organic matter, total nitrogen, available phosphorus, and available potassium were the key indices in the process of eco-restoration. ④The degree of systematic coupling coordination between plant diversity and soil factors was given priority at a weak level, i.e., granite slope < limestone slope < sandstone slope. It was consistent with soil fertility of the slopes.【Conclusion】 After 6 years of natural restoration on the rocky slopes based on net-suspended spray seeding, the plant diversity of slopes increased gradually and had not reached the steady state. Full consideration should be given to local plants when greening project, especially the Rosaceae and Poaceae families, and fertilizer enhances the artificial management of the upper slope.