Electronic ear tag suitable for breeding sows and animal insurance industry

The utility model provides an electronic ear tag suitable for breeding sows and animal insurance industry. The electronic ear tag comprises an ear tag auxiliary tag and an ear tag main tag, the ear tag auxiliary tag comprises an insert sealing cap and a lock hole insert; the insert sealing cap comprises a cap body and a mounting snap ring, the mounting snap ring is fixedly arranged at the bottom end of the cap body, and a supporting step is formed by an inner ring of the mounting snap ring and the bottom of the cap body; the lock hole insert comprises an insert ring body, a supporting ring is arranged on the inner side of the bottom end of the insert ring body, an inner ring of the supporting ring extends upwards to form a conical lock ring, and a lock hole is formed in the conical lock ring. A clamping groove is formed between the periphery of the conical locking ring and the insert ring body; the insert sealing cap is clamped in the clamping groove through the mounting clamping ring; the ear tag main tag co