This study identifies the methyltransferase TaSAMT1, which converts salicylic acid (SA) to methyl salicylate (MeSA) and confers freezing tolerance in wheat. Overexpression of TaSAMT1 significantly enhances freezing tolerance by increasing MeSA accumulation and decreasing SA levels, while knockout of TaSAMT1 results in sensitivity to freezing stress. The BR signaling pathway, mediated by TaBZR1, interacts with the SA pathway to regulate TaSAMT1 expression. TaBZR1 directly binds to the TaSAMT1 promoter and recruits the histone acetyltransferase TaHAG1, which increases histone acetylation and modulates the SA pathway during freezing stress. Overexpression of TaBZR1 or TaHAG1 alters TaSAMT1 expression and improves freezing tolerance. These findings reveal a key regulatory node integrating the BR and SA signaling pathways in plant cold stress response, providing potential targets for breeding cold-tolerant wheat varieties.This study identifies the methyltransferase TaSAMT1, which converts salicylic acid (SA) to methyl salicylate (MeSA) and confers freezing tolerance in wheat. Overexpression of TaSAMT1 significantly enhances freezing tolerance by increasing MeSA accumulation and decreasing SA levels, while knockout of TaSAMT1 results in sensitivity to freezing stress. The BR signaling pathway, mediated by TaBZR1, interacts with the SA pathway to regulate TaSAMT1 expression. TaBZR1 directly binds to the TaSAMT1 promoter and recruits the histone acetyltransferase TaHAG1, which increases histone acetylation and modulates the SA pathway during freezing stress. Overexpression of TaBZR1 or TaHAG1 alters TaSAMT1 expression and improves freezing tolerance. These findings reveal a key regulatory node integrating the BR and SA signaling pathways in plant cold stress response, providing potential targets for breeding cold-tolerant wheat varieties.