Abstract: Some long distance air ammunition can be used to attack large still target. According to the mathematical description of target-missile relative motion built by the message that supplied by the SINS/GPS of air ammunition, the slide predictive guidance law for guided air ammunition was designed by aoplying optimal slide quadratic index. The all trajectory mathematical simulation under all kinds of disturbing has been implemented by applying the designed slide predictive guidance law and using the aerodynamic parameters of air ammunition. The results indicate that this guidance law has strong anti-disturbing performance.

Key words: automatic controlling technique , air ammunition , guidance law , slide prediction , quadratic index