Water treatment device for echelon high-efficiency hardness removal

The invention discloses a water treatment device for echelon high-efficiency hardness removal. The water treatment device comprises a direct-current power supply group and a reactor shell, the interior of the reactor shell is divided into an upper cavity and a lower cavity through a partition plate, the interior of the upper cavity is divided into a first cavity and a second cavity through a first insulating partition plate and a second insulating partition plate, a plurality of first electrostatic hardness removal assemblies are arranged in the first cavity, and a plurality of second electrostatic hardness removal assemblies are arranged in the second cavity; the partition plate comprises a split-flow water distribution plate and an insulation supporting plate which are spliced, the split-flow water distribution plate directly faces the first cavity, the first electrostatic hardness removal assembly and the second electrostatic hardness removal assembly are connected with the direct-current power source set,