A hand washing device mounted on a wash basin for use mainly comprises a hand washing basin and a water feeding pipe, wherein a drainage pipe is arranged below the hand washing basin, during hand washing, a water switch is switched on firstly, the water switch controls a water valve on the water feeding pipe, and water flows into a water spray pipe and is sprayed into the hand washing basin through water spray holes in the hand washing basin; fine water jet is jetted inwards from the periphery of the hand washing basin, the spray range for hand washing through spray is large, the scouring force is stronger, and more water is saved; the water switch is switched off after hand washing, an air switch is switched on, an air boosting device sucks air and feeds the airflow into an air ejection pipe through an air conveying pipe after boosting, the airflow is ejected to a hand from air ejection holes in the hand washing basin, moisture on the hand is blown into the hand washing basin by the airflow and drained from the drainage pipe below the hand washing basin, and a hand drying effect is realized.