Abstract: In the study, wild Arthraxon hispidus population distributed in purple soil hilly area of different slope was taken as a test material, indicators like reproductive ramets quantitative characteristics, biomass structure, reproductive investment rate and reproductive redistribution were measured and analyzed. The result showed that wild A.hispidus on the 50° cross-section can complete life cycle. When the slope was larger, the variation coefficient of inflorescence traits and seed setting rate was greater. The slope significantly affected the maximum, minimum and average value of root, stem, leaf, inflorescence biomass. When the slope was larger, more biomass distributed into root and less biomass into inflorescence. The habitat significantly affected reproductive investment rate and reproductive redistribution when the slope value was larger, the value of reproductive investment rate and reproductive redistribution was lower. The wild A.hispidus had a strong ability to adapt to arid and barren sectional habitat. Therefore, wild A.hispidus was an excellent lawn grasses resources in protecting solid soil slope, and should be exploited and utilized.