Abstract: The unity of knowledge, belief and practice through learning, thinking and applying is the basic principle of the generation of Marxist belief within the members of the Communist Party, which involves three sub stages in this process: triggering, catalyzing and sublimating. The Marxist belief within Party members originates from their scientific understanding of Marxism and is shaped by their true knowledge and belief in it. Through learning to thinking, the triggering process of the generation of Marxist belief within Party members is from scientific cognition to true knowledge and faith. The loyalty of Party members towards Marxism is the internal driving force behind their belief in Marxism, while their willpower is an important spiritual lever. Through thinking to applying, the catalytic process of the generation of Marxist beliefs within Party members is a progress jointly driven by loyalty and willpower. The generation of Marxist belief within Party members is achieved by the faithful practice of Marxism and is deepened by their new knowledge. Through learning promoted by application, the leap from faithful practice to new knowledge is the sublimation process of the generation of Marxist belief within Party members. These three sub processes together constitute a spiral upward process that conforms to the laws of cognition and practice, which is the overall process of the generation of Marxist belief within Party members.