Abstract: How to develop a novel missile guidance law that can act effectively against very high speed incoming targets, such as ballistic missiles, has been a major concern in the defense technique. On the basis of this requirement, a new integrated proportional navigation guidance is developed in this research against very high-speed maneuverable targets on three-dimensional space. Proportional navigation (PN) has attracted a considerable amount of interest in the literature related to missile guidance and continues to be a benchmark for new missile guidance laws.