In order to study the effect of hydration heat of concrete and pouring of concrete in different times on the temperature field of cement concrete pavement at early age. Using the ABAQUS analysis platform of heat conduction, to prepare concrete hydration heat, the first and the second kind of heat conduction boundary conditions Fortran subroutine, the model can be changed in typical weather conditions in summer cloudless 3,12,16,21 pouring concrete pavement temperature within 72 hours. The results showed that: compared with the experimental value by buried in the pavement of central temperature sensor test, verify the correctness of the analysis of the early age cement concrete pavement temperature field study theory. The research shows that in the summer typical cloudless weather conditions, ignoring the hydration heat of concrete will bring 5℃error to the calculation of the temperature field of the early age concrete pavement ; the best casting time of cement concrete pavement is 16.p.m to 21.p.m.