Soil physical and chemical index deterioration of urban green space is the main obstacle factor of urban green landscape beautification.Biochar and biochar-based fertilizer application can effectively improve the production of soil fertility and crop yield of farmland，but the effect of biochar and biochar-based fertilizer on urban green space soil fertility and green plant growth is still not clear.A pot experiment was conducted to evaluate the effect of biochar and biochar-based fertilizer and their application rates 0%，0.5%，1%，2%，4% and 6% on soil physical and chemical properties and growth of Ocimum basilicum var. majus.The results showed that biochar significantly decreased soil bulk density，while biochar-based fertilizer had no effect on soil bulk density as comparing with the control. There was no significant difference in soil pH after amending with biochar，while biochar-based fertilizer markedly decreased soil pH by 0.23～1.09 units.Biochar-based fertilizer amendment treatments significantly increased soil available N by 4.78～53.55 mg/kg than that of the control，while biochar treatments had no difference with the control treatment.There was significant increase in soil available phosphorus by 1.26～6.05 and 1.11～8.51 mg/kg for biochar and biochar-based fertilizer treatments，respectively.There was also significant increase in soil available potassium by 22.6～326.9 and 43.2～174.7 mg/kg for biochar and biochar-based fertilizer treatments，respectively. As compared with the control，both biochar and biochar-based fertilizer treatments significantly increased soil cation exchangeable capacity by 0.79～1.27 and 1.16～2.42 cmol/kg，respectively.Biochar-based fertilizer treatments significantly increased chlorophyll content of O. basilicum var. majus compared to the control，and biochar had no significant effect on the content of chlorophyll.When the amount of biochar was more than 1%，the biomass of the O. basilicum var. majus increased significantly，and the biomass of the O. basilicum var. majus significantly increased when the biochar-based fertilizer was less than 2%.The results indicated that biochar and biochar-based fertilizer could effectively improve soil physical property，and both amendments could improve soil available nutrients and nutrient preserving capability.Taking the plant growth into consideration，1% of biochar-based fertilizer was recommended under the conditions of this experiment .