The invention discloses a plant stress tolerance associated protein TaPPR, and an encoding gene and an application thereof. The protein can be a protein (1) with the amino acid sequence represented by SEQ ID No.2, or a protein (2) obtained by substituting and/or deleting and/or adding one or more amino acid residues to the amino acid sequence represented by SEQ ID No.2 and having same functions with the protein (1). The TaPPR gene expresses under the induction of salt, BR, Al<3+> salt and low temperature. The TaPPR protein can improve the resistance of Arabidopis thaliana to the following three tolerances: salt, BR and the Al<3+> salt, and TaPPR gene overexpression Arabidopis thaliana is sensitive to low temperature. The TaPPR protein and the TaPPR gene provide a foundation for artificial control of expression of stress resistance and stress tolerance associated genes, and will play a great role in the cultivation of stress resistance and stress tolerance reinforced plants.