马克思主义研究对象和理论范畴体系的总体特征是 :实践基础上的严整性和发展性 ,以实践为基础的科学性、革命性的高度统一及以实践为基调的统一性 ;马克思主义的诞生史说明了马克思主义理论的发端是从实践概念的论述和转变开始并始终以实践为主线贯穿全过程的。因此 ,实践是马克思主义整体理论的主线。 The general characteristics of Marxist object of study and theoretical category system are: the strictness and development based on practice, the practice-based science, the high degree of revolutionary unity and the unity of practice based on the basic principle; the birth history of Marxism It shows that the starting point of Marxism theory starts from the exposition and transformation of the practice concept and always runs through the whole process with the practice as the main line. Therefore, practice is the main line of the overall Marxist theory.