Abstract: Understanding of the dynamic changes in mangrove and associated driven factors is significant for the present international studies of mangrove biogeomorphology. Here, the temporal and spatial processes of the mangrove forest between 1987-2021 over the tidal-reach of the Jingujiang River Estuary were analyzed by combination of field survey and remote sensing images decomposition based on Google Earth Engineer platform. The results can be shown as follows: ①The distribution in mangrove communities of this tidal reach from sea to land exhibited a distinct mode in turn of “mixture of Aegiceras corniculatum and Kandelia obovata”→“mixture of Excoecaria agallocha, Aegiceras corniculatum and Kandelia obovata”→“mixture of Excoecaria agallocha, Aegiceras corniculatum, Kandelia obovate, and Avicennia marina”, which can be characterized by simple population structure with similar age-classcompositi.on. ② The total area of the mangrove forests along the Jingujiang River has decreased by 36% in recent decades. Meanwhile, mangroves that located at areas of the Jingujiang River Estuary, sections of Yudonggenjiang River and Xiabujiang River remained lasting reduction. However, the mangrove area of the Wangyajiang River had net gain of 20.89 hm² from 1987 to 2000, and net loss 13.74 hm² from 2000 to 2021. ③Human activities and engineering measures such as pond culture and urban construction have changed the regional habitats such as sediment granularity and porosity, which affecting the age structure of mangrove communities and directly led to the degradation of mangrove forests. The results can benefit to estuarine mangrove conservation and ecological restoration.