Involved is a herbicide-resistant protein, coding gene and use thereof. Theherbicide-resistant protein comprises: (a) a protein consisting of an aminoacid sequenceshown in SEQ ID NO: 2; or (b) a protein consisting of an amino acid sequenceat least 90%identical to that set forth in SEQ ID NO: 2. The herbicide-resistant proteinof this applicationis especially suitable for expression in plants, with broad resistancespectrum to herbicides,especially to phenoxy auxin herbicides.