Through enumerating the historical data, this article elaborates the development reason of littoral agricultural economy in Fujian province in Song Dynasty based on four aspects including population, lands, farming technology, water conservancy.

• 摘要通过史料的列举，从人口、土地、农耕技术、水利4个方面阐述了宋代福建沿海农业经济发展的原因。