Labor is the basis for human beings, and is also the prerequisite for labor education to become education. From Marx and Engels,s elevation of productive labor to "the first prerequisite for the existence of human society, to Mao Zedong's advocacy that "education must be integrated with the productive labor, to Xi Jinping's in-depth exploration of the nature of labor with a lofty perspective of historical materialism, both the firm beliefs in establishing the spirit of labor, and the examination of labor education with a developmental perspective, have fully demonstrated the deep connotation of the Marxist labor notions and the evolution logic of the Marxist labor education notions. The combination of productive labor and education is the main line of labor education, and the supporting role of labor education in the 'four educations' of morality, intelligence, physique and beauty reflects the ontological status of labor education. Therefore, the realization path of labor education needs to overcome the practical difficulties, and constantly explore and innovate in practice.