The soil properties and water conservation function of 5 types of vegetation were studied on sandy coast, the results show as the follows: (1) Soil properties and the storing capacity of water of meadow and mixed forest were better than that of pure forests; (2)The sequence of the water conservation function of soil is Meadow> Mixed forest of Japanese Black Pine and Silver Chain>Japanese Black Pine forest > Chinese tamarisk forest > Silver Chain forest; The water conservation function of the surface layer is higher than that of substrate; (3)The water-holding rate of saturation and water capacity of litter range from 105.12% to 453.64% and 4.58 t/hm~2 to 33.17 t/hm~2 respectively, and the best type is Silver Chain forest; (4)The total capacities of conservation water vary from 1 476.66 t/hm~2 to 1 870.38 t/hm~2. Among them, the total water capacities of soil are above 98% of the total.