The invention discloses plant alkali resistance-related protein GsERF71 and a coding gene and application thereof. The protein GsERF71 is the protein selected from a), b) or c): a) protein of which an amino acid sequence is as shown in sequence 2; b) fusion protein obtained through connecting a label at an N end and/or a C end of the protein as shown in the sequence 2; and c) protein with the same function obtained through replacing and/or deleting and/or adding one or more amino acid residues to the amino acid sequence as shown in the sequence 2. An experiment proves that the gene is over-expressed in arabidopsis thaliana, and the resistance of the arabidopsis thaliana on alkali stress in a germination stage and a stocking stage can be strengthened and the protein GsERF71 is capable of laying a foundation for cultivation of transgenic plants with alkali resistance.