The invention provides an ultrahigh frequency tag decoding device supporting error correction, which is characterized by comprising a ternary counter, a carry counter, a PIE counter and an error correction symbol decision device. After the PIE symbol is received, the ternary counter and the PIE counter start counting, and when the counting value of the ternary counter is 2, 1 is added to the carrycounter. And after the PIE symbol is finished, the error correction symbol decision device performs error correction according to counting values of the ternary counter, the carry counter and the PIEcounter, and judges whether the current PIE symbol is 0 or 1 according to the corrected values. The method has the beneficial effects that when the decoding clock frequency is relatively low and theTari length is relatively short, the problem of misjudgment of a traditional decoding method can be solved.