Fluid damper

The utility model relates to a fluid damper, which comprises an upper portion and a lower portion, wherein the upper portion and the lower portion are independent to each other. The upper portion of the fluid damper comprises an upper disk flange, a first permanent magnet block and a first lock block, and the first permanent magnet block is fixed inside the upper disk flange through the first lock block. The lower portion of the fluid damper comprises a disk, a lower disk flange arranged opposite to the disk and a hydraulic cylinder in a non-leak connection with the disk and the lower disk flange, and the lower disk flange, the disk and the hydraulic cylinder form a non-leak closed space. A piston inside the damper is pushed to move by magnetic force and a spring, when the piston moves, damping fluid flows through a small circular through hole and consumes energy, thereby being capable of controlling shocks.