This paper aims to discuss the concept of class in the works of Liu Shipei, a Chinese revolutionary intellectual. When discussing the ethnic revolution of Manchuria, Liu first included class in the description of Chinese system, ethics and Chinese society. After he crossed to Japan and accepted the anarchist revolutionary ideas of hardliners, he used class as a broad synonym for hierarchical society and various inequalities. After understanding and recognizing the Marxist class struggle thought, Liu turned his attention to China. Liu started from the issue of Chinese people’s livelihood to find the subject and object of China’s anarchic class revolution. Class became the concept carrier of his narration of class revolution, and its semantic domain was further expanded. Through the analysis, we can see that Liu’s understanding and use of the concept of class is closely related to his revolutionary ideas, and changes accordingly.