In light of the increasingly multidimensional and complex combat environment， the form of warfare has also undergone a profound transformation. With the continuous development of artificial intelligence technology， its influence in various fields keeps growing. This paper provided a comprehensive overview of the principles and evolution of reinforcement learning， and analyzed the application of deep reinforcement learning in the field of intelligent guidance. It further summarized key technologies within intelligent guidance， and based on current research progress， offered a detailed examination of existing challenges and the implications of AI. This analysis aims to provide insights and directions for the advancement of intelligent guidance.