A rotary maintenance type leakage protector, comprising a base, a leakage protection device and an upper cover plate, wherein the leakage protection device comprises a return key, a return rotating stop block, an electromagnetic driving device and a dome; a power connection end which may be electrically connected with the dome is further arranged on the base; the return rotating stop block is mounted to an upper portion of the base in a manner of moving up and down, and extending ends which may abut on the dome are arranged on two sides of the return rotating stop block; the electromagnetic driving device is arranged on one side of the upper portion of the base, a driving iron core is arranged on the electromagnetic driving device, the driving iron core extends from the electromagnetic driving device and is movably clamped with a side wall of the return rotating stop block, and the electromagnetic driving device may drive the driving iron core to move, thereby driving the return rotating stop block to rotate; a buckling clamping block is arranged on the return rotating stop block, the return key is sleeved with a return spring, one end of the return spring abuts on an upper portion of the upper cover plate, and the other end of the return spring abuts on the return key; the return key penetrates through the upper cover plate to be inserted into the return rotating stop block; the electromagnetic driving device kept in an energised state may cause the driving iron core to keep tightening the return rotating stop block and keep the buckling clamping block clamped with the return key to further drive the return rotating stop block to move synchronously, and the return key may keep an energised state that the dome contacts with the power connection end through the return rotating stop block; and after the electromagnetic driving device kept in the energised state is de-energised, the driving iron core releases the return rotating stop block, the buckling clamping block is released from clamping with the return key, and the dome is separated from the power connection end to be de-energised under the action of own elasticity, wherein a bayonet clamped and matched with the buckling clamping block is formed in the return key, and an upper clamping surface and a lower release bevel are arranged on the bayonet. the return rotating stop block is mounted to an upper portion of the base in a manner of moving up and down, and extending ends which may abut on the dome are arranged on two sides of the return rotating stop block; the electromagnetic driving device is arranged on one side of the upper portion of the base, a driving iron core is arranged on the electromagnetic driving device, the driving iron core extends from the electromagnetic driving device and is movably clamped with a side wall of the return rotating stop block, and the electromagnetic driving device may drive the driving iron core to move, thereby driving the return rotating stop block to rotate; a buckling clamping block is arranged on the return rotating stop block, the return key is sleeved with a return spring, one end of the return spring abuts on an upper portion of the upper cover plate, and the other end of the return spring abuts on the return key; the return key penetrates through the upper cover plate to be inserted into the return rotating stop block; the electromagnetic driving device kept in an energised state may cause the driving iron core to keep tightening the return rotating stop block and keep the buckling clamping block clamped with the return key to further drive the return rotating stop block to move synchronously, and the return key may keep an energised state that the dome contacts with the power connection end through the return rotating stop block; and after the electromagnetic driving device kept in the energised state is de-energised, the driving iron core releases the return rotating stop block, the buckling clamping block is released from clamping with the return key, and the dome is separated from the power connection end to be de-energised under the action of own elasticity, wherein a bayonet clamped and matched with the buckling clamping block is formed in the return key, and an upper clamping surface and a lower release bevel are arranged on the bayonet.