Abstract: In order to research the functional relationship of grassland populations in the process of shrub-grass vegetation restoration, and based on Levins niche breadth and Pianka niche overlap indexes, grassland vegetation niche character and community structure were studied in different slope position in Wufeng Mountain Area, Jinan City. The results showed that: dominant specie Arundinella anomala had the maximum niche breath in bottom slope, middle slope and top slope, and the next was Arthraxon hispidus. The niche breadth of Zoysia japonica and Themeda japonica decreased with the rise of the slope. The niche breadth of Themeda japonica was 0 in top slope. The niche breadth of Allium senescens increased with the rise of the slope. The niche overlaps between Arundinella anomala and Arthraxon hispidus and Zoysia japonica with greater niche breadth were higher than others in three slope positions. The niche overlaps between Allium senescens and Arundinella anomala and Arthraxon hispidus and Zoysia japonica were higher in top slope than in middle slope and bottom slope. In top slope, the niche overlap between Themeda japonica and others was 0, and it showed that Themeda japonica had no symbiotic relationship with other species in top slope. The niche characteristics of grassland vegetation could better indicate their ecological adaptability and distribution range.