Although　informal　economy　has　become　important　urban　landscape　in　contemporary　China,　there　are　fewer　quantitative　studies　on　its　spatial　structure　from　the　perspective　of　macroscopic　scale.　Therefore,　the　feasibility　and　necessity　of　vending　zones　are　still　full　of　controversy.　To　fill　in　this　research　gap,　the　thesis　used　point　data　of　street　vendors　and　formal　commerce　in　2010,　which　respectively　came　from　digital　urban　municipal　management　system　and　industrial　and　commercial　bureau　registration　system　of　Chaoyang　District　in　Beijing.　Via　DO　Index　and　M　Function,　this　research　mainly　probed　into　the　spatial　structure　of　street　vending　and　its　spatial　relationship　with　formal　commerce　separately.　According　to　empirical　analysis,　firstly,　this　paper　found　that　most　vending　types　and　their　occupied　areas　presented　a　pattern　of　significant　agglomeration.　Furthermore,　the　vending　type　which　had　close　relationship　with　residents＇　demand　showed　less　agglomeration　degree.　Secondly,　compared　with　the　spatial　structure　of　formal　commerce,　street　vending　agglomerated　more　intensely　in　a　tiny　scale.　Concretely,　street　vendors,　as　a　whole,　reached　the　peak　extent　of　agglomeration　at　only　approximately　250　to　300　meters.　However,　the　extent　of　their　agglomeration　declined　dramatically　when　spatial　scale　magnified.　Thirdly,　street　vending　and　formal　commerce　which　provided　similar　commodity　or　service　had　not　shown　significant　co-　located　spatial　relationship,　but　there　existed　evident　co-dispersion　with　each　other.　What＇s　more,　the　extent　of　co-　dispersion　would　be　stronger　in　a　smaller　spatial　scale.　In　conclusion,　although　street　vending　presented　strong　mobility,　it　had　a　stable　spatial　pattern.　Thus　this　research　demonstrated　the　feasibility　and　necessity　of　setting　inclusive　vending　zones,　and　proposed　elementary　policy　suggestion　of　its　principle　and　types.　For　example,　the　government　could　introduce　flexible　and　fixed　vending　zones　in　order　to　satisfy　different　demands　of　various　vendors.　Furthermore,　the　area　need　not　be　enlarged　and　would　give　preference　to　the　area　with　limited　formal　commerce　supply.　©　2017,　Science　Press.　All　right　reserved.