The application discloses an
ion beam steady flow device, which comprises an arc power supply, a
cathode assembly and a trigger
assembly, wherein the positive pole of the arc power supply is grounded; the
cathode assembly comprises a
cathode target material and a target material seat, and a permanent
magnet is arranged at the target material seat; the trigger assembly comprises a trigger
electrode, a trigger pin and an auxiliary
anode plate. The arc power supply applies
voltage to the target material seat and the trigger
electrode, so that the trigger pin is in contact with the cathode target material to form a
short circuit, an
electric arc is formed instantaneously, a
plasma is formed in the
electric arc, and the
electric arc spot moves on the surface of the cathode target material; the auxiliary
anode plate is grounded, and when the electric arc spot moves to the edge of the cathode target material, the electric arc spot returns to the center of the cathode target material due to the fact that the potential of the auxiliary
anode plate is higher than that of the cathode target material, so that the electric arc spot is prevented from falling on the side surface of the cathode target material and causing
arc extinction. The application further provides an arc
ion plating device comprising the
ion beam steady flow device, so that the
ion beam stability is improved, and the arc
ion plating quality is improved.