Seashore is composed of silty sediment in Jiangsu province, content of organic matter is low, soil structure is bad, and the capacity of resistance to erosion is weak. To probe into the characters of soil and water losses and management ways in enclose tideland for cultivation, according to the investigated and measured data in this region. The characters of soil and water losses in enclose tideland for cultivation of seashore were analyzed: Precipitation is the most mainly external agent to lead to soil and water losses, water erosion is main form of soil and water losses. Resistance to shear of silty soil is small, gravitational erosion always takes place as the same time as water erosion. Wind erosion is one of main form of soil and water losses under the condition of lacking the vegetation protection. Management ways of soil and water loses in enclose tideland for cultivation of seashore were put forward: Scientific program and reasonable determine use and improve direction. Adopt biological ways to improve eco environment and construct artificial eco system. Carry out necessary engineering ways to improve the capacity of resistance to erosion of gully, river and road. Nurse with the best of care and reasonable cultivation to improve the capacity of resistance to erosion of saline soil. These provided basis for conservation of soil and water and comprehensive exploitation of land in enclose tideland for cultivation, and have significance for economic sustainable development of this region.