The study aimed at introducing the design scheme of the active tag in 2.4 GHz frequency band for pig based on RFID technology. And through the actual circuit board test, the following results were come up： communication distance and signal strength gradually increased with the data transfer rate reducing in multiples; better communication effects were achieved in the data transfer rate of 60 kbps or 10 kbps; the active tags could be recognized accurately within 50 m, greatly improving the security of swine food safety traceability system.
