Vehicle side turning alarming device

The invention provides a vehicle side-turning over alarm device which comprises a microprocessor module, a power supply module connected with the microprocessor module, a keyboard circuit, an alarm circuit, a LED drive display module, a MEMS micro-accelerometer module and a roll angle circuit, wherein an output port of the roll angle circuit is connected with an I/O input port of the microprocessor module, the MEMS micro-accelerometer module is connected with an input interface of the microprocessor module, the roll angle circuit comprises a roll angle sensor arranged on a vehicle carriage, and the MEMS micro-accelerometer module comprises a MEMS micro-accelerometer arranged on the vehicle carriage. The device has the small volume and the high reliability, and can be applied to various new and old vehicles. The device has the obvious action for improving the running safety of the vehicle.