The invention belongs to the technical field of bathroom accessories and relates to a shower room accessory, in particular to a wall sealing cover. The technical problems that the connection stability is poor and the like in the prior art are solved. The wall sealing cover comprises a lower positioning body which is formed by connecting a cylindrical body with a plate body which is eccentrically arranged on the top of the cylindrical body, wherein a middle positioning hole and two nail through holes which are located in the periphery of the middle positioning hole are formed in the lower positioning body; the aperture of the middle positioning hole is greater than the apertures of the nail through holes; the middle positioning hole and the nail through holes are located in the same straight line; an upper positioning body with a U-shaped groove is arranged on one end, far away from the cylindrical body, of the plate body; the U-shaped groove is communicated with the middle positioning hole; the groove width of the U-shaped groove is larger than the aperture of the middle positioning hole; two axial through grooves which are respectively located in the groove wall of the U-shaped groove and are communicated with the nail through holes one by one are formed in the upper positioning body; the axis wires of the axial through grooves and the axis wires of the nail through holes are overlapped. The wall sealing cover has the advantages that the structure is simple, and the connection stability is good.