Seawater desalination filtering membrane

The invention relates to the technical field of filtering membranes, in particular to a seawater desalination filtering membrane which comprises a reverse osmosis membrane and surface membranes on the two sides of the reverse osmosis membrane, connecting grooves are formed in the two sides of each surface membrane, edge sealing parts are connected to the two sides of each surface membrane through the connecting grooves, and limiting grooves are formed in the edge sealing parts; the limiting groove comprises an inserting groove and a clamping groove, the inner diameter of the inserting groove is smaller than that of the clamping groove, the edge sealing parts are arranged to prevent leakage caused by gaps formed in the connecting edges of the reverse osmosis membrane and the surface membrane, and the edge sealing parts are silica gel edge sealing parts and are arranged at the two ends of the water outlet pipe when the filtering membrane is wound on the water outlet pipe; the outer wall of the water outlet pipe