The vibration energy exists widely in nature, and the use of intelligent materials to collect vibration energy to power microelectronic systems is a development trend in the field of new energy. In this paper, a kind of MSMA vibration energy harvester based on cantilever beam is designed by using the inverse effect of a new smart material of magnetically controlled shape memory (MSMA).The structure of each part of the collector is analyzed theoretically and designed systematically, and the structure model of the vibration energy harvester is established. The finite element analysis of magnetic field is carried out by using ANSYS software, and it is verified that the magnetic circuit and magnetic induction intensity meet the requirements of vibration energy harvesting. On this basis, a prototype of harvester is developed and tested by setting up an experimental platform. The results show that the cantilever MSMA vibration energy harvester has a wide frequency band of vibration energy acquisition, and the output voltage can reach 220 mV, which provides a reference for the collection and utilization of vibration energy.