The invention relates to the technical field of Internet of Things. The invention further discloses a supermarket shopping cart sundry cleaning device based on the Internet of Things technology. The device comprises a shell, an RFID recognizer is movably connected to the interior of the shell, a plug pin is movably connected to the interior of the shell, an N pole is movably connected to the interior of the shell, an S pole is movably connected to the interior of the shell, a movable rod is movably connected to the interior of the shell, a motor is movably connected to the interior of the shell, and a lead screw is movably connected to the exterior of the motor; under the interaction of the shell, the RFID identifier, the plug pin, the N pole, the S pole, the movable rod, the motor, the screw rod, a crawler belt, a connecting rod, a movable plate and a sliding rod, when the shopping cart is not used, the movable plate can move through transmission among structures, then sundries in theshell are gathered and discharged through an outlet, and therefore it can be guaranteed that after a customer uses the shopping cart, the sundries can be removed.