Aiming at the problems of the single direction and low efficiency collection of the existing vibration energy collecting device, a kind of self-coordination omni-directional vibration energy collecting device is designed in this article. The vibration characteristics of the device are changed through the coupled multiple fields, so as to improve the energy conversion efficiency. The horizontal and vertical vibration model of device has been established, and the dynamic characteristics of all directions vibration have been analyzed. The structural parameters have been optimized by using the finite elements analysis. Then the relationship between the structure parameters and the resonant frequency has been obtained. Finally, the experimental platform for self-coordination omnidirectional vibration energy collecting device has been set up. The experiments show that the resonant frequency increases with the enlargement of width and thickness of composite cantilever beam in energy collecting device. The resonance frequency is 16.47 Hz, and the peak voltage is 9.67 V when the composite cantilever beam width of 10 mm, the thickness of 1 mm as well as the vibration force of 1.5 N are selected. And it can produce effective output voltage in all directions.