The study on loss calculation and temperature rise feature of controllable reactor of transformer type（CRT）is crucial to the optimization design of CRT. In this paper

the loss and temperature rise of CRT are analyzed based on such two representative structures of CRT as concentric CRT and split magnetic integrated CRT respectively. Given the voltage of operating winding

the winding current is calculated accurately by the field-circuit coupling method. Both core loss and winding loss of the CRT are calculated respectively by the use of finite element method（FEM）and analytical formula method to verify the correctness of simulation result of FEM. For the design calculation example of CRT with two structures

the loss obtained at rated capacity is used as the excitation of the temperature filed so to obtain the temperature rise distribution of each part and perform the heat transfer analysis of the core and winding of CRT. The method adopted in this paper and the result obtained provides a definite theoretical guidance for the design and optimization of the CRT.