Abstract: An inrush current limitation circuit for limiting inrush current when powered-on includes a power source, a switch, a voltage dividing circuit, a second diode, a transistor, a zener diode, a charging capacitor and a first diode. The voltage dividing circuit is connected between a second end of switch and a ground to divide the direct current voltage to obtain a trigger voltage signal. An anode of the second diode is connected to the second end of the switch. A base of the transistor electrically is connected to a cathode of the second diode, and a collector connected to the cathode of the second diode. A cathode of the zener diode is connected to the base of the transistor; an anode of the zener diode is connected to the ground.