The network catchphrase is a popular linguistic phenomenon and it is conventional among netizens.It is discovered that college students' using network catchphrases is characterized by three features:high awareness,rational perception and tolerant identification.The study of the three paths-identity,tool rationality and emotion is helpful to understand the internal mechanism of college students spreading network catchphrases.It is also beneficial to make timely use of network catchphrases in political and ideological education to college students.