Abstract: In order to evaluate characters of soil carbon and alkaline nitrogen in urban green lands, investigations were made on soil organic carbon,alkaline nitrogen and their vertical distribution characteristics and correlation in unban green lands(park, road, residential land and campus) in Changchun City.The results showed that soil physical and chemical properties, organic carbon(SOC) and alkalinity nitrogen(AN) content were significantly influenced by green space type and soil profile(P<0.05).The mean values of soil pH in 0~30 cm soil depth under different green lands were:campus > road > residential land > park;The mean values of soil SOC in 0~30 cm soil depth under different green lands were:park > road > residential land > campus;The mean values of soil AN in 0~30 cm soil depth under different green lands were:park > residential land > campus > road;Correlation analysis showed that soil SOC was positively correlated with AN,while green soil pH was negatively correlated with SOC content. This led to the conclusion that the alkalysis nitrogen content should be increased in the soil,and the soil pH should be adjusted to optimize the soil, increase the carbon sequestration, weaken the greenhouse effect and improve the ecological environment.