The invention provides a low-power-consumption self-
cutting-off circuit and a level switching circuit of the low-power-consumption self-
cutting-off circuit. When a
voltage cutting-off
signal generated by a working circuit hops from a low level to a high level,
voltage domain switching of the
signal is conducted through the level switching circuit, the
signal is sent to the
clock end of a trigger, and then the output end of the trigger outputs
high voltage to a power circuit so that the
voltage provided for the working circuit by the power circuit can be
cut off. After the voltage supplying is
cut off, the level of the voltage cutting-off signal of the working circuit slowly returns to zero, and the level of the signal output by the level switching circuit is kept being clamped at a low level. A low level efficient signal of a power-on reset signal is awakened to be connected to the trigger through an
and gate and is reset so that the power circuit can be controlled to normally provide the voltage for the working circuit. Under the condition that a power supply is
shut down, according to the low-power-consumption self-cutting-off circuit and the level switching circuit of the low-power-consumption self-cutting-off circuit, the level of a power cutting-off signal can be kept unchanged, therefore, the off-position is kept, and
power consumption is reduced. Meanwhile, no static
power consumption is produced by the circuits when the circuits work normally.