The coastal zone is located in boundary between land and sea, is the central zone of the exchange of material and energy, and has complex sedimentary environment. The correct understanding and interpretation of the ancient environmental information of its sedimentary records depends largely on the establishment of the age framework. The advent of210Pb and137Cs dating to solve the high-speed sedimentary environment in the time range for 100 years or less sediment dating. In recent years are widely used. In the practical application, we should choose the appropriate dating method according to the purpose, scope and other factors. In addition, there is a lack of each method, and may also have several methods suitable, so in order to increase the accuracy and reliability of the dating data, we should try to choose a variety of appropriate methods for comparative dating.%海岸带地处陆地和海洋交界地区，是物质和能量交换的中心地带，沉积环境复杂。而对其沉积记录古环境信息的正确理解和解释在很大程度上依赖于年代框架的建立。210Pb和137Cs年代学的问世，解决了高速沉积环境中时间量程为百年或更短的沉积物的定年，近年来得到广泛的应用。在实际应用中，我们应该根据研究目的、范围等因素，选择合适的测年手段测年。此外，由于每种方法还存在不足，且可能同时会有几种方法适用，所以为了增加测年数据的准确性和可靠性，我们应尽量选择多种适当方法进行对比测年。
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