The invention relates to a novel UHF_RFID tag and a manufacturing method. The printed board of the UHF_RFID tag is connected to a metal shell through a metal pin. The internal portion of the UHF_RFIDtag is encapsulated by a high polymer material. In the invention, through the high temperature encapsulation of the high polymer material, a printed board antenna, a radio frequency tag chip and otherstructures are fixed in the metal shell. The excellent mechanical performance and heat resistance performance of the high polymer material ensure that a radio frequency tag can bear a poor engineering environment under a drilling platform. When the radio frequency tag is normally read and written, the dielectric constant of the high polymer material can ensure that a tag antenna has good overallperformance.