The calculation of thermal stress is important to high concrete arch dam. In the progress of construction simulation analysis, the distribution of thermal stresses should be paid attention for it has great influence to arch design and rapid construction. The impacts on thermal stress are water temperature and air temperature and so on. In this paper, the author also thought about of the influence of creep, and applied the formulations of predecessors to finite element program. A engineering example about some high arch dam proves correctness and feasibility of considering thermal-creep –stress.