The invention discloses a multifunctional household automatic dishwasher. The multifunctional household automatic dishwasher comprises a disinfecting chamber, a cleaning chamber, two lifting mechanisms, a sliding gate mechanism and a bracket. The disinfecting chamber, the sliding gate mechanism and the cleaning chamber are all fixed to the bracket. An upper cover is arranged at an upper end opening of the disinfecting chamber. At least three electromagnetic push rods are arranged at the bottom of a side wall of the disinfecting chamber. The sliding gate mechanism is arranged at a lower bottomsurface of the disinfecting chamber. Each of the lifting mechanisms comprises a lifting motor, a lifting screw rod, a tray and a support arm. The invention, through reasonable installation and structure design, integrates the sliding gate mechanism, the electromagnetic push rods, the lifting mechanisms, a rotating mechanism, a slag crusher and other structures into a whole, thereby effectively saving occupied space of a kitchen and achieving convenient operation. The multifunctional household automatic dishwasher provided in the invention has multiple functions like cleaning, disinfection, slag crushing and the like. Therefore, the dishwasher is convenient in operation, highly practical and facilitating for its use by a user, thereby improving user experience.