Multifunctional animal ear tag for quick threading, grading and positioning

The invention relates to a multifunctional animal ear tag for quick threading, grading and positioning. The multifunctional animal ear tag comprises a main tag body, a sub tag body, an ultrahigh-frequency RFID chip, an environment temperature sensor and an animal body temperature sensor, main tag needle holes are formed in the main tag body, and sub tag needle holes are formed in the sub tag body;the ear tag further comprises quick threading, grading and positioning needles and bearing clamps; quick threading needle protection columns extend to the outer side surfaces of the sub tag needle holes, the quick threading, grading and positioning needles penetrate through the main tag needle holes and the sub tag needle holes, are aligned at the bearing clamps, penetrate through the quick threading needle protection columns and are fixedly clamped, and accordingly the grading and positioning function is achieved; the number of the quick threading, grading and positioning needles is three, and the three main tag nee