The present invention discloses a self-test module of electronic circuit breaker. The self-test module comprises a power supply assembly, a self-test enablement assembly, an induced power supply assembly, a boost power supply and a micro control unit. The power supply assembly comprises a rechargeable battery. The self-test enablement assembly comprises an enablement button, a capacitor and a first power chip which are connected in series. The self-test enablement assembly is connected to the rechargeable battery. The induced power supply assembly comprises a buck chip. The boost power supply comprises a second power chip and a boost chip which are connected in series. The micro control unit provided with a plurality of pins which are connected to the first power chip, the second power chip, the buck chip and the boost chip respectively. The self-test module of electronic circuit breaker has two working modes, the electronic circuit breaker may be provided with a load current or without a load current. The MCU operates the self-test procedure, indicates the self-test status and maintains the indication for a period of time.