The invention discloses a wireless vibration monitoring system applied to auxiliary equipment of a thermal power plant and provided with a self power generation device. The system is composed of a data acquisition module, a self power generation module, a data processing module, a data transmission module and an APP intelligent device client side. A vibration signal of the auxiliary machine is preprocessed through a DSP high-speed processor and is sent to an intelligent device terminal through a Bluetooth interface or a Wi-Fi interface, in this way, a user can receive vibration information and fault early warning information conveniently and rapidly, and offline diagnosis of equipment faults can be achieved. According to the system, the bistable state piezoelectric vibration power generation technique is adopted, equipment vibration energy is converted into electric energy, self power supply of the wireless monitoring system is achieved, the application environments of the wireless monitoring system are widened, monitoring of vibration of the auxiliary equipment of the thermal power plant is effectively achieved in the severe environment, safe and reliable operation of the auxiliary equipment is guaranteed, and productive benefits of the power plant are greatly increased.