Portable electric rotary toothbrush for children

According to the technical scheme, the portable electric rotary toothbrush for children is characterized in that a sterilization assembly is arranged, solar energy is converted into electric energy through a solar cell panel, the electric energy is stored in a first battery, power is supplied to an ultraviolet sterilization lamp and a heating resistance coil, and the ultraviolet sterilization lamp can conduct ultraviolet sterilization and disinfection on a toothbrush head; the heating resistance coil is heated after being powered on, the heating plate can be heated, and therefore the toothbrush head can be heated and dried, and the situation that water in the toothbrush head breeds bacteria and affects the body health of children is prevented. The wet toothbrush head is difficult to dry and sterilize in time, so that certain bacteria are possibly bred, and the body health of children is influenced; a heating plate is arranged, a heating resistance coil is controlled to be turned on through a first switch butt