In order to avoid the damage of PZT of galloping energy harvester under high flow rate and ensure stable output characteristics in complex working environment, a galloping piezoelectric-electromagnetic energy harvester (GPEEH) using magnetic force to control the vibration amplitude of cantilever beam is proposed in this paper. The introduced nonlinear magnetic force can control the amplitude of the bluff body, improve the output stability of PEH, improve its adaptability to high wind speed environment, and increase the output voltage of the composite energy harvester. The influences of different load resistance, wind speed, key structural parameters d0 and d1 on the output characteristics of the energy harvester are investigated by using the fabricated wind tunnel experimental platform and the experimental prototype. The experimental results show that when the amplitude of the PEH bluff body is limited to a certain range by the magnetic force, the vibration frequency and velocity of the bluff body gradually increase with the increase of the wind speed. The main frequency of PEH vibration (6.3 Hz) at wind speed of 11.5 m/s is 1.4 times that of PEH vibration (4.3 Hz) at wind speed of 8.4 m/s. The output power of GPEEH is 6.18 mW at wind speed of 12 m/s, which is 47% higher than that of a single galloping piezoelectric energy harvester. When the wind speed reaches 10.5 m/s, the output power of PEH and EEH tends to be stable.