To achieve low-frequency, multi-directional energy harvesting and high output performance, a piezoelectric energy harvesting system with arc helix structure is proposed in this article. The arc helical piezoelectric energy harvester cannot only reduce the resonance frequency and the volume of the system, but also the arc type cantilever beam has asymmetry. Therefore, the multi-directional collection can be performed. The stress distribution, the resonant frequency and the output performance of the energy harvesting system with different radians are analyzed theoretically. The 2π, 3π, and 4π arc spiral piezoelectric vibration energy harvesting system are fabricated, and their performance are measured and compared. Results show that the 4π arc spiral piezoelectric energy harvesting system has better output performance. The resonant frequency is 47 Hz, the output voltage is 23 V, and the output power is 353 μW. The arc spiral piezoelectric vibration energy harvesting system can be applied to human health detection, environmental control systems, embedded systems, military security and other application fields.