The invention discloses a metal ornament surface electroplating treatment device. The device comprises an electroplating tank, an anode, a cathode, a rectifier and a base, wherein the anode and the cathode are arranged in the electroplating tank, the cathode is erected at the middle position in the electroplating tank through a guiding mechanism, the base is arranged below the electroplating tank,one side, located on the base, of the electroplating tank is sequentially provided with a filtering unit and a swinging mechanism, and the rectifier is arranged on one side of the base. According tothe device, the arranged cathode is erected in the electroplating tank through the guiding mechanism to cooperate with the swinging mechanism, and the cathode and an ornament hung on the cathode swingin a regular low-frequency manner in the electroplating tank, so that convection of solution is accelerated, metal ions consumed in the vicinity of the cathode are timely supplemented, concentrationpolarization effect of the cathode is reduced, the electroplating efficiency of the metal ornament is improved, through the low-frequency cathode movement mode, the defect that mud and slag are proneto deposit on a plated piece is overcome, and the electrode reaction speed is improved while the electroplating quality is ensured.