The invention discloses a high-sensitivity leakage protection plug. The high-sensitivity leakage protection plug comprises a leakage protection control circuit board, a test button, a contact spring, a push rod, a solenoid coil, an iron core, a brake bridge, a reset part and a dual-point hook, wherein the leakage protection control circuit board is internally provided with a DC power supply unit for supplying power thereto. The structural design is ingenious and reasonable, power is supplied by use of the DC power supply unit, the problem of affected determination due to clutters existing in a conventional AC circuit is effectively solved, the determination of the leakage protection control circuit board is enabled to be more accurate, and the reaction is more rapid; the dual-point hook employs a dual-point cooperation structure, the cooperation is stable, the frictional force is small, release is easy, and smooth and flexible release motion is effectively ensured; the bottom surface of the test button is provided with a carbon film, contact-point contact is better, and the reaction is more sensitive; at the same time, an integrated element RV4145 IC with more sensitive reaction is utilized, and the sensitivity is further improved; and besides, the overall structure is compact and simple, the volume is small, the realization is easy, the safety and reliability are high, and application safety is effectively ensured.