The utility model discloses lightning energy extracting device used for lightning arrester monitoring equipment, which is characterized by comprising a lightning current sensor (1) and a power supply circuit (2). The lightning current sensor (1) employs a current transformer, comprising a magnetic core, a primary coil (N) in series with a lightning arrester and a secondary coil (N1), and the primary coil (N) and the secondary coil (N1) of the power supply are respectively winding on the magnetic core; the power supply circuit (2) comprises a rectifier bridge (D1), a pressure-sensitive resistor (MOV1) and a capacitor (C1) supplies power for the lightning arrester monitoring equipment; the AC terminal of the rectifier bridge (D1) is in parallel with the secondary coil (N1) of the lightning current sensor (1) and the pressure-sensitive resistor (MOV1); and the DC terminal of the rectifier bridge (D1) is in parallel with the capacitor (C1). According to the utility model, the lightning energy extracting device used for lightning arrester monitoring equipment is passive equipment, the practical and economical performance is good, the service life is long, and the lightning energy extracting device used for lightning arrester monitoring equipment is specially suitable for the power supply of the lightning arrester stator indicator of a 35 kV or more than 35 kV circuit.