Abstract: This paper carries out a simulation analysis of the thermal stress in the whole dam section of the rock-filled concrete end dam of Yebatan Hydropower Project in the high-altitude cold region, focusing on the effects of transverse joint setting and surface thermal insulation. The results demonstrate that setting a transverse joint can effectively control the scope of high tensile stress area, and reduce the maximum principal stress by about 0.8 MPa. Surface insulation measures can effectively reduce the temperature fluctuation of the surface concrete and reduce the maximum principal stress by about 0.6 MPa. As a result, Yebatan end dam can satisfy the temperature control requirements by setting a transverse joint and adopting surface thermal insulation measures.