Provided is a personal air sterilization and purification device, comprising: a purification device body, a filter element, a filter element cover, and a sterilization assembly, a notch being formed at an upper portion of the purification device body, a bottom of the notch being provided with a filter installation slot, a bottom of the filter installation slot communicating with an interior of the purification device body, the filter element cover being snapped onto the purification device body, the filter element cover matching the notch, a filtering space being formed between the filter element cover and the filter installation slot, the filter element being detachably installed at a bottom side of the filtering space, the filter element cover being arranged opposite to the filter element, and the sterilization assembly being fixedly installed inside the filter element cover.