Miniature seawater desalination device

The utility model relates to a miniature seawater desalination device which comprises a seawater pretreatment unit and a reverse osmosis desalination unit, wherein the seawater pretreatment unit comprises a water intake hole, a water intake pump, a micro-electrolytic tank, a sand-leaching tank, an activated carbon tank and a micro-filter membrane component, and the reverse osmosis desalination unit comprises a high-pressure pump, a reverse osmosis membrane component, an activated carbon absorption column and a fresh water tank. Fresh water prepared by the miniature seawater desalination device accords with the sanitary standard for drinking water of GB5749-2006, can be directly used as water for production and living and is particularly suitable for supplying water to islands and ships.