“In order to establish a reliable and efficient method for evaluating the cold resistance of pear germplasm resources, identify the cold resistance of pear germplasm resources, and screen high cold resistant germplasm, the research team used a differential thermal analysis system to measure the low-temperature heat release temperature of 112 pear germplasm resources' branch tissues, established a temperature damage regression equation, and comprehensively classified the germplasm into 5 categories through membership function analysis and cluster analysis. Seven excellent cold resistant germplasm, including "Hebei Duli" and "Hanxiang", were screened out, providing technical support and theoretical basis for pear cold resistant breeding and cold resistant mechanism analysis.”