The invention discloses HbsHsp2 protein coming from hevea brasiliensis, and an encoding gene and application thereof. The provided protein is shown as the following (a) or (b) or (c): (a) protein comprising the amino acid sequence shown in the sequence 1 of a sequence table; (b) protein derived from the protein of the sequence 1 by substituting and/or deleting and/or adding one or multiple amino acid residues related to the adversity stress resistant capability of the plate from the amino acid sequence of the sequence 1; and (c) protein derived from the protein of the sequence 1 by substituting and/or deleting and/or adding one or multiple amino acid residues related to the adversity stress resistant capability of microbes from the amino acid sequence of the sequence 1. The provided protein and the encoding gene thereof play an important role for improving the salt stress resistant capability and the high temperature stress resistant capability of plants and improving hevea brasiliensis yield.