Considering the target selecting problem of anti-warship guided missiles in the long range precise attack, a related mathematic model about force-distribute-code target selection was built. The influence of various factors on the guided missile's selecting ability and the methods for improving the anti-warship missile's selecting ability were got through emulating and calculating the probability of the missile selecting the pre-selected target inside a formation under the conditions. The way for improving the long range precise attacking was also found, that is, make full use of the force-distribute-code target selection, and this depends on obtaining more target's and missile's parameters and comprehensive designing a target searching alternative for the missiles.