The invention discloses a strong magnetic gathering type magnetofluid sealing structure. Two first pole shoes are arranged in a space between the outer surface of a shaft and the inner wall of a shellin the axial direction in a spaced manner, and an axial
magnetization type permanent magnetic ring is sandwiched between the two first pole shoes; each first pole shoe is annular; the outer circle ofthe axial
magnetization type permanent magnetic ring and the outer circle of each first pole shoe are connected with the inner wall of the shell in an abutting manner; each first pole shoe comprisesa ring body; the position, on an inner ring of each ring body, of the end face of one side of the ring body is provided with a first extending ring, and the minimum inner
diameter of each first extending ring is larger than the outer
diameter of the shaft; the two first pole shoes are arranged in the axis direction perpendicular to the shaft in a mirror symmetry manner; the two first extending rings are oppositely arranged, a gap is reserved between the opposite end surfaces, and magnetofluid is injected to the gap position; and the shaft is made from a non-
magnetism-conductive material. Due to the strong magnetic gathering type magnetofluid sealing structure, the
magnetic field does not pass through the shaft, the path of the whole
magnetic loop becomes shorter, the corresponding magneticresistance is lowered, the
magnetic field intensity in the whole magnetic path is greatly enhanced, the
magnetism gathering purpose is achieved, and the sealing pressing resisting capacity of the magnetofluid is greatly enhanced.