In the asphalt concrete core dam, the combination of the concrete base and the asphalt core wall has a direct impact on the safety and seepage control system of the dam. By simulating the combination of concrete base and asphalt concrete core wall, four kinds of different construction technology are selected, which are asphalt mortar, asphalt mastic, cold base oil and no treatment. The strength was measured by the direct shear method, and the results show that under the condition of the same normal stress, the construction method of asphalt mastic has the maximum shear strength , and it also has certain anti deformation ability. Therefore, it is recommended to use the construction method of asphalt mastic, which provides a theoretical basis for the construction of asphalt concrete core wall dam.