The utility model provides an anticorrosive cap structure in sleeve pipe mud line suspension, including circular end plate, the edge of circular end plate upwards extends and forms annular flange, circular end plate and annular flange enclose into the cell body of an opening, it is on a parallel with to be equipped with one in the cell body the fixed plate of circular end plate, the attach fitting also is located in the cell body, be equipped with the attach fitting on the fixed plate the attach fitting is connected with the convey tool cooperation in the sleeve pipe mud line suspension. The utility model discloses can prevent that the fishing net from twining on the attach fitting, can also ensure the stability the when cooperation of its and convey tool is connected, prevent the utility model discloses drop.