Most of the temperature field calculation programs at present have certain defects. In light of the merits of ANSYS platform which has complete pretreatment function, powerful equation solver, convenient post-processing function and good openness, a more applicable simulation program of calculating the temperature field of mass concrete structure is proposed and demonstrated based on ANSYS platform. According to the actual pouring progress and thermodynamic parameters, a Roller Compacted Concrete (RCC) dam is simulated and calculated. The difference of the maximum temperature between the calculated values and the measured values at the measurement points is less than  1.8 ℃  , and the relative difference is within the range from -5% to 5%, which indicates that the calculation program developed on ANSYS platform can be used to simulate and calculate the temperature field of mass concrete structure.