Leakage protection plug is widely used in the leakage protection of electric ambient table, water storage water heater, electric hairdryer, electric clip, electric clipper, vacuum cleaner, electric bath tub, electric water heater, electric rice cooker, TV set, refrigerator, microwave oven, washing machine, dishwasher, sterilizer, water dispenser, computer, power tools and medical equipment, instrumentation, and other terminal electrical appliances.