Using magnetic shape memory alloys (MSMA) smart materials to convert mechanical vibrational energy into electrical energy so as to power wireless electronic devices has been widespread concerned by many scientific and technological workers. This paper has analyzed the working principle of the MSMA vibration energy harvester, calculated and identified the magnetic yokes, coils, protection system, dimensions of the fixtures and performance parameters of vibration energy harvesting system by utilizing the Villari effect (inverse magnetostrictive effect) of the magnetic shape memory alloy. In addition, this paper has simulated the system using ANSYS 13.0 software and verified the correctness of the structure parameters of each part and material selection. On this basis, we have designed the MSMA vibration energy harvester prototype, built MSMA vibration energy harvester experimental platform, conducted vibration force excitation experiments and obtained the output curve of induced voltage under the conditions of different input frequency and different stress. Finally the experimental and simulation results have demonstrated the feasibility of converting mechanical vibration energy by MSMA material into electrical energy and provided a reference for further vibration energy harvesting.