Using multi-photon nonlinear Compton scattering model and finite-difference time-domain method,the influence of Compton scattering on the dispersion properties in magnetized-plasma photonic crystals is studied by way of theoretically analytical and numerical simulation methods.A new dispersion mechanism produced by incident light and Compton scatter in the magnetized-plasma photonic crystals has been pointed out.The results show that the zero dispersion frequency and the cut-off frequency increase with Compton scattering and there exists a difference between the zero dispersion curve and the flat band.The nonlinearity of the first dispersion curve has a remarkable increase and the nonlinearity of the last dispersion curve decreases obviously.When the relative dielectric constant in the background increases to a certain value，the Compton scattering makes the central place of the band gap decreased and makes the band gap width increased.The theoretical analysis and numerical simulation conform to each other well.