Numerical calculation and analysis of proton radiation effects on CCD based on Monte Carlo method were developed by Geant4,a 3-D Monte Carlo code.The projected ranges and Bragg peaks of protons in Si and SiO_2 were calculated and the results were in good agreement with the reference data.The ionizing energy losses of protons in SiO_2 and non-ionizing energy losses in Si were also calculated and the results were in good agreement with the reference data.The detailed geometry model of the pixel of CCD was est...