Liquid level detection device

The utility model provides a liquid level detection device. The liquid level detection device comprises an installation base, a first leaf spring, a floating ball, a magnetic reed switch and a magnet. One end of the leaf spring is fixed to the installation base. The floating ball is connected with the other end of the first leaf spring. The magnetic reed switch is fixed to the installation base and located above the other end of the first leaf spring. The magnet is arranged at the position, corresponding to the magnetic reed switch, of the other end of the first leaf spring. The liquid level detection device avoids the fault that when a floating ball adheres to a rod, an existing rod floating ball liquid level meter fails, and the liquid level of certain liquid like liquid with high viscosity can be detected conveniently.