Partial circulation type household water purification device and household water purification machine

A partial circulation type household water purification device relates to the field of water treatment and comprises a booster pump, a first membrane desalination unit, an electric desalination unit and a second membrane desalination unit. Wherein a first concentrated water outlet of the first membrane desalination unit is communicated with a second water inlet of the electric desalination unit. After membrane desalination treatment, produced concentrated water is conveyed to the electric desalination unit to be further treated, and water in the concentrated water is recycled. Recycled water can be conveyed back to the first membrane desalination unit through the backflow pipeline to be treated and can also be conveyed to the second membrane desalination unit to be treated and then mergedinto the water outlet pipe to be recycled by a user. The partial circulation type household water purification device is reasonable in arrangement and easy to operate, the water utilization rate of the whole partial circulati