In order to improve the precision of impact point prediction of elliptical orbit, a method of impact point prediction based on optical measurement data was presented. Firstly, the constraint conditions of elliptical orbit was introduced. Then, the algorithm model of impact point prediction based on the technology of orbit restrain self-calibration was set up. Finally, the simulation results of impact point prediction in typical cases were supplied. The simulation results show that the prediction method based on the optical measurement data is feasible, the systematic errors of device can be precisely calibrated by the technology of orbit restrain self-calibration, and the precision of impact point prediction can be improved.