A piezoelectric vibration and magnetic field hybrid energy harvesting shockproof hammer was designed to solve the problem of harmful vibration and power supply and endurance of sensors in the smart grid environment. The main piezoelectric beam of the shockproof hammer harvests the vibration energy of the transmission line, and the secondary piezoelectric beam harvests the changing magnetic field energy generated by the current via the magnet installation, avoiding the need for the coil in standard magnetic field energy harvesting. The finite element simulation analysis and experiment test on the harvester are carried out. The results show that the harvester operates in a wider frequency band, which is 54% higher than that of the output of the traditional single beam. The maximum output power of the main piezoelectric cantilever beam can reach 874 μW, and the maximum power of the secondary piezoelectric beam can reach 683 μW.