Abstract: A Coastal dynamic monitoring system was established on the eastern coast of Wanning Between2011 and2014.This system including 120 shoreline monitoring stations and30 beach monitoring stations, and4 years of shoreline and beach profile information monitoring data were collected.Based on the field measured date assistant with coastal information from field survey, the coastal erosion processes on eastern coast of Wanning were studied in this paper.The erosion of the coastline shows a seasonal pattern in which erosion dominates the summer and autumn and deposition the winter and spring.The coastline is generally in a receding trend in inter-annual variation, and there was also a seasonal change pattern in inter-annual variation.In addition to natural factors, foreshore sand mining is one of the principal causes of coastal erosion in the study area.Areas subjected to sand mining and typhoons exhibit a considerably receded shoreline characterized by abrupt, erosionsusceptible cliffs up to 8 m in height.