在聚砜基膜上用界面聚合法制备了两种复合型纳滤膜 Ｐ Ａ０１ 和 Ｐ Ａ０２ 。在０３ Ｍ Ｐａ 下， Ｐ Ａ０１ 膜对 Ｍｇ Ｓ Ｏ４溶液（２０ ｇ· Ｌ－ １ ） 和 Ｆｅ Ｃｌ３ 溶液（１０ ｇ· Ｌ－ １ ） 的脱盐率分别为９６０ ％ 和７８０ ％ ， 水通量分别８５ （ Ｌ·ｍ － ２ ·ｈ － １ ） 和７８ （ Ｌ·ｍ － ２ ·ｈ － １ ） ； Ｐ Ａ０２ 膜对 Ｍｇ Ｓ Ｏ４ 溶液（２０ ｇ· Ｌ－ １ ） 和 Ｃａ Ｃｌ２ 溶液（０５ ｇ· Ｌ－ １ ） 的脱盐率分别为９８０ ％ 和８８８ ％ ， 水通量分别为１０ （ Ｌ·ｍ － ２·ｈ － １ ） 和１２ （ Ｌ·ｍ － ２ ·ｈ － １） ； Ｐ Ａ０１ 和 Ｐ Ａ０２ 膜对本校地下水的脱盐率分别为８４０ ％ 和９２４ ％ ， 水通量分别为７８ （ Ｌ·ｍ － ２ ·ｈ － １ ） 和１２ （ Ｌ·ｍ － ２ ·ｈ － １ ） 。结果表明， 所制得的复合型纳滤膜在低压下具有高的脱盐率和水通量， 可用在水质的软化、多价离子的分离和饮用水的深度净化等方面。还采用扫描电子显微镜（ Ｓ Ｅ Ｍ） 和接触角测定仪对所制备的膜结构进行了表征 Two kinds of composite nanofiltration membranes P A01 and P A02 were prepared by interfacial polymerization on a polysulfone-based membrane. At 03 M Pa, the desalination rates of P A01 membrane for MgSO 4 solution (2.0 g · L -1) and FeCl 3 solution (1.0 g · L -1) were 960% and 780% of the water, and the fluxes of water were 85 (L · m - 2 · h - 1) and 78 (L · m - 2 · h - 1) The desalination rates of 0 g · L -1 and 0,5 g · L -1 were 980% and 888%, respectively, and the flux of water was 10 (L · m -2) · H - 1) and 12 (L · m - 2 · h - 1) respectively. The desalination rates of P A01 and P A02 membranes to groundwater in our school were 840% and 924%, respectively. 7  8 (L · m - 2 · h - 1) and 1  2 (L · m - 2 · h - 1). The results show that the prepared composite nanofiltration membrane has high desalination rate and water flux under low pressure, which can be used in the softening of water quality, the separation of multivalent ions and the deep purification of drinking water. The prepared membrane structure was also characterized by scanning electron microscopy (SEM) and contact angle measurement