The invention relates to a household RO membrane fast-
assembly membrane shell and an RO membrane element, and relates to the field of
filtration and purification assembles.The household RO membrane fast-
assembly membrane shell comprises a shell body, an end cover, a sliding ring and a traction
assembly, an opening is formed in one end of the shell body, an annular first connecting sleeve is integrally formed in the outer
diameter position of the end cover, an elastic piece which is obliquely and outwards arranged is integrally formed at one end of the first connecting sleeve, and the elastic piece is arranged in the shell body; the sliding ring is in axial sliding fit with the shell, a second connecting sleeve is fixed to the inner wall of the open end of the shell, the
peripheral face of the second connecting sleeve is a first matching face, and the
diameter of the first matching face is gradually reduced in the direction away from the closed end of the shell. The inner circumferential face of the sliding ring is provided with a second matching face and a guiding face, the
diameter of the second matching face is gradually reduced in the direction away from the closed end of the shell, the traction assembly is used for forcing the sliding ring to axially move in the direction towards the closed end of the shell, and the second matching face clamps the elastic piece to the first matching face. The mounting and dismounting efficiency of the shell and the end cover can be improved, and the mounting stability is high.