Scout missile has the characteristic of constant height and constant velocity cruise flying, so the whole flight track can be divided into beeline-stage and wheeling stage. Under the reasonable hypothesis, a guidance approach can be brought forward: using position control method and deviation angle control method in the beeline-stage and using the swerve control method in the wheeling stage in order to complete the guidance of whole track and insure that in the flying of scout missile the error of deviating from flight track is relatively small.