The utility model relates to a portable electric toothbrush with a sterilizer. The portable electric toothbrush comprises an electric toothbrush body and a sterilizer component, wherein the electric toothbrush body comprises a toothbrush main body, a toothbrush head connected to the upper end of the toothbrush main body in a splicing and buckling way and an electric toothbrush battery cover which is connected rotationally with the lower end of the toothbrush main body an electric driving mechanism is arranged in the cavity of the toothbrush main body and is connected with the toothbrush head through a transmission shaft the sterilizer component comprises a front cover body into which the toothbrush head can be inserted, a sterilizing lamp arranged in the cavity of the front cover body, a control mechanism connected with the sterilizing lamp and a POWER supply connected with the control mechanism and a sterilizer battery cover which is rotationally connected to the front cover body and is used for accommodating the POWER supply. The low-power-consumption sterilizing function of the entire toothbrush is realized by using a COLD cathode ultraviolet (UV) lighting tube, the toothbrush head is replaceable and the service life of the toothbrush is prolonged a magnet pull-in switch-on/off structure is adopted, so that the structure is simple and the operation is convenient the toothbrush head is not exposed outside and so that the toothbrush head is clean and healthful and moreover, the entire toothbrush has a small size and is convenient to carry.
