Water softening structure and regeneration method therefor

A water softening structure, comprising:

• a first-stage water softening unit group that comprises A water softening units connected in parallel and that is connected in sequence to a second-stage water softening unit group, wherein A≥1;
• the second-stage water softening unit group comprising B water softening units connected in parallel, wherein B≥1;
• a controller, which can control a switching apparatus to disconnect a certain water softening unit needing to be regenerated according to adsorption amounts of the water softening units;
• wherein the control switching apparatus connects in parallel a regenerated water softening unit to the second-stage water softening unit group, and at the same time, controls to connect in parallel a certain water softening unit in the second-stage water softening unit group to the first-stage water softening unit group;
• and
• the switching apparatus, which is disposed at a general water inlet and connected to each water softening unit respectively, can control, according to a controller instruction, each water softening unit to be connected in parallel to or be disconnected from a certain water softening unit group;
• wherein all the water softening units simultaneously run and are separately regenerated.