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From Jan,2013 to now,We carried out the vegetation investigation studies in the ecological monitoring programs,Shenzhen,total researched 170 plant communities of the street region and mountain areas etc.,researched and analysed these communities structural characteristics and pant diversity,comparative analysed natural forests,semi-natural forest and artificial forest composition characters and family,genus and species diversity level,composition characteristics,the main affected factors; researched and analysed the relationship plant community structure characteristics with the absorbing ability to PM2.5 pollutants.In the paper,introduced some represented plant communities researched results and situations,pointed at the vegetation distribution status and some plant community component problems,proposed the suggestions on promoting and optimizing local vegetation composition elements and structure,so that rising the each area plant diversity and the biomass of plant communities,improving ecological environment and optimizing ecosystem.In order to responding the call of Shenzhen Government for constructing ecological city,Oct.2006,Shenzhen Environmental Monitoring Center combined with Zhongkai University of Agriculture and Engineering put forwarded constructing ecological monitoring network system in whole city scope,obtained government supported and investment,in 2012,constructed 5 ecological monitoring stations in 5 District and New Districts of Dapeng,Futian,Baoan,Pingshan and Nanshan,Shenzhen.Then two organizations combining carried out ecological monitoring in respect of plant,insect,high animal and microbe,then continue made other many areas measures and researches,especially carried out lot of vegetation ecology researches,collected many of plant specimens,built the data bases of plants and animals.In aspect of plant community and diversity research,we total made 170 communities research,in the paper,main introduced a part of the research situation of the communities.These researches are important significant and theory reference to exploring the status of ecosystem structure,and tracking monitoring the change trends of these biological characters and factors,and plant ecology,phytogeography,ecological monitoring research,and the strategy draw up and optimization of local ecosystem protection.