The invention discloses a calculating method of a large-volume concrete cooling temperature field. The method comprises the following steps: superposing the energy of concrete dissipated by the wall surface of a cooling water pipe onto a conventional fonctionelle; establishing a finite element governing equation of the concrete containing the cooling water pipe through a variational principle based on the composite fonctionelle; and then estimating an equivalent heat emission coefficient of a concrete contact surface based on the thickness and the heat conductivity coefficient of the cooling water pipe. The existence of the cooling water pipe is not considered during the mesh generation; sections intersected with concrete units are found out based on the positions of the cooling water pipe after the mesh is formed, thereby a cooling water pipe mesh is automatically formed. The method does not increase the difficulty in the mesh generation, and precisely considers the temperature change around the cooling water pipe. Therefore, the method is an efficient method for analyzing the cooling effect of the cooling water pipe; and the problems that the conventional methods are too big in the degree of freedom and are unable to be calculated by computers are solved.