本文提供混凝土大坝四级配混凝土大型试件导温，导热系数的试验方法与试验设备的工作成果。并对某工程四级配混凝土大型试件与二级配混凝土小型试件导温、导热系数的试验成果进行了比较分析，阐述了一些因素对导温、导热系数的影响。 This paper provides the test methods for the temperature and thermal conductivity of large-scale test specimens of concrete dams with four grades of concrete, and the results of the test equipment. A comparative analysis was made on the test results of the temperature and thermal conductivity of a large-scale concrete specimen with a fourth-grade concrete and a small concrete specimen with a second-grade concrete. The influence of some factors on the temperature and thermal conductivity was described.