In alpine area,the average annual temperature is constantly lower,and the heat dissipation process of internal concrete is slow,and the surface of RCCD is prone to crack.Aiming at this problem,crack mechanisms of the dam and crack prevention methods are analysed and summarized.The main influence factors of impoundment in these areas are studied,and effect for impoundment of storage time and level and temperature control in construction period are summarized.The 3-D FEM is used to stimulate the engineering examples.It can be referred by the similar projects for construction and water impoundment plan.