Method for manufacturing a long-range RFID metallic product and structure thereof are provided so that UHF RFID skills can be smoothly applied on the various metallic products without interference. Electromagnetic waves radiated from a transmitter can be received by a metallic first antenna. With the resonance and induction generated by the resonance chamber located in the metallic first antenna and a second antenna of the electronic tag module patch, the signal generated can be transmitted to the RFID chip to achieve long-range reading and transmitting effects. Due to the breaking cutlines of the first rigid clip located on the second antenna of the electronic tag module patch, the second antenna of the electronic tag module patch is damaged when removing the electronic tag module patch from the metallic first antenna by tearing along the breaking cutlines of the first rigid clip, thereby preventing the RFID from being duplicated.