The coastal zone of Guangzhou city,located beside the Zhujiang River estuary,is a kind of silt flood plain.There are wide beach,many kinds of wetlands,and rich wild lives in the coastal zone.Based on the study,it was found that the ecological environment of the zone had been significantly changed since the reform and open of China.Serious ecological problems created such as lost of natural wetlands or the transformation from natural wetlands to controlled wetlands,pollution of water,decline of plant and animal sources,biological invasion of exotic species,more often of flood disasters,et al.As a result,the coastal zone became more fragility.The problems was mainly caused by the development of the coastal zone such as enclosing tideland for cultivation.According to the spatial development tactics of ‘extend toward south' of Guangzhou city,more powerful development of the coastal zone will be operated.It is crucial to protect the ecological environment in spite of the government has pay much attention to sea protection,restoration of mangrove wetland,and establishment of reserves.