Agriculture　has　a　variety　of　functions.　City　green　space　can　be　viewed　as　the　agricultural　ecological　function.The　flourishing　of　the　urban　green　space　is　the　inevitable　result　of　the　urban　development.　For　the　practical　and　the　need　of　the　urban　green　space　development,　this　paper　discuss　how　to　build　the　least　street　parks　at　the　junctions　to　meet　the　demand　of　residents　by　using　the　coverage　set　to　establish　model.