A safe power plugging mechanism is configured on a power base with a pivot joint, wherein a male plug with conducting plates at its inside is configured on the pivot joint and is electrically connected with the pivot joint. A half-tile-shaped insulating tile configured outside the pivot joint axis is integral with the enclosure of the male plug, and partly encloses the pivot joint axis. A power connection plate is configured inside the power base to electrically connect the conducting plates of the male plug when the male plug is turned to a specific angle. The safe plugging mechanism also includes a female plug, which is configured at its inside with two conducting poles fitting the conducting plates of the male plug. The safe power plugging mechanism adopts a method of electric connection through a pivot joint axis which maintains connection at a specific angle and insulation at other angles.