The invention discloses a multifunctional water purifier. A gear in a pressing-down block at the rear end of a handle switch is separated from a control gear on a screwed valve element through an elastic reset part, so that when a user uses the purifier, the handle switch is needed to be pressed down to compress the elastic reset part so as to make the gear and the control gear matched mutually, then the screwed valve element can be driven for water outflow, if a child does not press and only shifts the handle switch, the screwed valve element cannot be driven, the purifier can be started by pressing the handle switch to insert a copper sheet at the rear end of a second insert part arranged at the rear end of the pressing-down block into a bayonet socket at the bottom of a second insert slot, and an electric shock event is prevented.