Abstract: Rationalism and irrationalism philosophy are of significance for understanding the origin and mitigation of Sports Alienation. By using the methods of literature and logical analysis, this paper surveys the "rationalism" and "irrationalism" philosophical evolution of sports alienation. The research shows that the seclusion of rationalism alienation often suspends the thinking of sports alienation, and the concealment of irrationality makes the philosophical thinking of sports alienation a mystery. In the complement to ancient Greek philosophical "nous" to "logos", irrationality emerged, and so did the philosophers' awareness of sports alienation. "Enlightenment rationality" in modern times led to the awakening of human, but the connotation of "enlightenment" means that irrationality is doomed to be concealed by rationality. "Alienation" exists but encounters disregard from rationalism philosophy. The philosophical origin of sports alienation lies in the Enlightenment-spurred limitation in "rationality", which results in that the discourse power of "rationality" is usurped by rationalization, and body becomes the object of rationalization. However, "rationalization" is not inevitable. People can find in irrationalism philosophy the philosophical thinking of mitigating both "rationalization" and sports alienation. The research puts forward that "body" has gradually replaced sports as the fulcrum of reflecting on sports alienation. In the irrational connection between "Tao" and "body" in ancient China's philosophy and in the philosophical spectrum of "body" established by irrationalism philosophy runs the internal logic of interweaving and transcendence of "rationality" and "irrationality". This can be the fulcrum to reconstruct "rationality" in understanding and practicing sports.

Key words: sport philosophy, sports alienation, rational, rationalism, irrationalism