By setting fixed plots,we surveyed and analyzed all sorts of communities of Bruguiera gymnoihiza(planted for one year on leveling beach and weeds control),Kandelia candel(planted for one year on leveling beach and weeds control) and Sonneratia apetala(planted for 3 years) in the north Hezhou of Zhuhai,and investigated the species number,dominance,and regeneration of S.apetala seedlings.The results are as follows.Plant species changed a lot with the season,and the species composition is unstable.Mikania micrantha invasion directly increased the fluctuation of plant species with the season.The dominance of major communities of artificial restored B.gymnoihiza and S.apetala was reduced directly by time,and their survival rates were reduced by the invasion of M.micrantha and other Poaceae grasses.The dominance of S.apetala markedly changed with the season;the invasion of Poaceae and Asteraceae plants could not settle down,leading to a stable biotope suitable for the growth of other mangroves.