Described herein is a fast-wearing grade-positioning wound-exposed multifunctional animal ear tag that includes a primary tag, a secondary tag, an UHF RFID chip, a half-duplex ULF RFID chip, an ambient temperature sensor, an animal body temperature sensor, a fast-wearing grade-positioning pin, and a bearing clamp. The ear tag measures animal ear root temperature and ambient temperature of a place where the animal resides. An ointment may be placed onto the UHF RFID chip, the half-duplex ULF RFID chip, and the ear tag in order to facilitate rapid wound healing.