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To improve the precision of the rocket, a guidance method based on impact point predication was proposed. Firstly, the dynamics equations was built for a type of rocket, then impact point predication model was adopted to design guidance law,finally the six-degree-of-freedom trajectory simulation model in Matlab/Simulink was established and simulated. The result indicates that the trajectory model is efficient, and impact point predication mode is practicable. Compared with uncontrol rocket, CEP of guided rocket was minished from 231 m to 31 m through impact point predication guidance law, rocket precision was improved availability in improving the precision of rocket.