Combined with the overall energy balance equation of the background plasma,the multi energy group equations which evolve the distribution function of α particles during slowing down are employed to perform self consistent numerical investigation of the burining plasma temperature profiles of importance to fusion reactors.By simulating both the dynamic and steady state plasma operating regime,it is showed that the burning plasma temperature profiles tend to be more peaked than that of the experimentally derived profiles.Such a feature is persisted whether or not there is significant diffusion of α particles during their slowing down and should be taken into account in future rigorous analyses of the behaviors and effects of α particles in fusion reactors.