Abstract: Displacement damage dose is a parameter used to quantify the displacement damage effect on electrical and electronic components. The method for calculating the displacement damage equivalent particle fluence is presented, which is used to characterize the displacement damage dose induced by the radiation environment on orbit. The characteristics of three different solar proton fluence models are proposed based on the analysis of results. The displacement damage doses on typical satellite orbits are calculated and the characteristics of the radiation environment relevant displacement damage are analyzed. This paper provides a reference for radiation hardness assurance for space systems.