Gradient alternating water activator

The invention relates to the field of water treatment equipment, and discloses a gradient alternating water activator. The gradient alternating water activator comprises a shell, a water pipe and a plurality of single-pole magnetic focusing devices, wherein a water inlet and a water outlet are formed in the shell; the water pipe is 8-shaped; the single-pole magnetic focusing devices are arranged on the surface of the water pipe in a sleeving manner to form a gradient alternating magnetic field completely covering the water pipe; the intensity of the magnetic field of a first S-shaped section of the 8-shaped water pipe is gradually increased, and the intensity of the magnetic field at the start point of a second S-shaped section is suddenly changed, but the intensity of the magnetic field along the second S-shaped section is gradually increased; the single-pole magnetic focusing devices comprise magnetic shielding sleeves and permanent magnet blocks; partitions are arranged on the inner circumferential surfaces of the magnetic shielding sleeves; the inner walls of the magnetic shielding sleeves, the partitions and the outer wall of the water pipe form permanent magnet grooves; and the permanent magnet blocks are arranged in the permanent magnet grooves. The gradient alternating water activator disclosed by the invention carries out magnetization treatment on water by using a gradient alternating magnetic field, and the treated water is higher in activity, dissolving property, penetration property and surface tension; and furthermore, the gradient alternating water activator is smaller in size and low in cost.