To investigate the characteristics and laws of energy releasefor Al/Ni reactive multilayer films(RMFs), Al/Ni RMFs initiator with double “V” type angle was fabricated by a micro-fabrication method and its characteristics and laws of energy release under 47 μF solid tantalum capacitor discharge excitation were studied. When electric explosion testing, the self-developed ALG-CN1 energy storage discharge detonator was used as an excitation power source. A 47 μF solid tantalum capacitor with a charging voltage of 10 V to 45 V was used. A high-speed camera（HG-100K）was used to observe the firing process of the initiator. A digital oscilloscope（LeCroy44Xs， 4 channnels）was used to record the current and voltage curves of the initiator.Results show that the electrical explosion process of Al/Ni RMFs initiator can be divided into three stages according to the change rate of current（dI/dt）：energy storage of parasitic inductance, electrical explosion of initiator and plasma heating. Comparison with NiCr film initiator of same bridge type,under the same excitation condition of 30 V/47 μF, the fabricated Al/Ni RMFs initiator has high output energy and long spark spattering distance after electrical explosion. The parasitic inductance of the firing circuit plays an important role in the initiation of the initiator. The output energy of Al/Ni RMFs initiator during electric explosion mainly comes from two parts： the input energy of capacitor and the chemical energy released by energetic film. When the excitation voltage is 30 V, the chemical energy contributes to the output energy of Al/Ni RMFs initiator is higher, which can reach 40% of the total output energy.