Abstract: The Monte Carlo code RMC has the capacity of neutron-photon-electron coupling calculation and can complete the precise shielding calculation. The Compton scattering simulation was carried out in photon transport process with the photon-atomic library. Through the analysis of the Compton scattering physical principle and the Doppler broadening method, the bounding electron Doppler broadening correction was completed with Compton profile and a selective treatment of free electron and bounding electron was achieved by using RMC code. The radionuclide test was carried out to observe the effect of Doppler broadening spectroscopy, and the correctness of the method is proved. Through the calculation and comparison of a typical pressurized water reactor component, the necessity and correctness of the Doppler broadening correction are verified.