The utility model relates to safety power plug and socket. The power plug and socket comprise a housing, a switch button and a socket that are arranged in the housing, a panel arranged on one side of the socket housing, a power jack arranged on the panel, and a power plug matched with the socket. The power plug and socket are characterized in that a window is formed at the upper part of the panel on one side of the socket housing; an upper retaining plate is fixed on the upper edge of the window; the switch button is arranged in the window; a safety device arranged below the window comprises two inserting plate sliding grooves symmetrically formed on the inner side in the middle part of the panel, an inserting plate clinging to the inner wall of the panel, a handle arranged at the upper end of the inserting plate, tension springs respectively arranged at the two ends of the bottom of the inserting plate, and two fixing blocks connected with the tension springs; the inserting plate is slidably connected with the inserting plate sliding grooves; and a groove is formed on the inserted pin of the power plug. The utility model has the advantages that the power plug can be guaranteed to have low probability of falling off after being inserted in the socket, and the power socket is closed under the circumstance that the plug is not inserted, so that the power plug and socket are safe and reliable.