It firstly illustrates the examples of CS on campus and classifies them into Chinese-English CS,Mandarin-Dialect CS and Cyber CS,and then puts forward that Code-Switching is a kind of memes and it functions as a cultural meme,a language meme and an informational meme in the process of communication.

In accordance with some ideas above,in 2003 a Chinese scholar proposed the concept of "language memetics",firstly combined memetics with linguistics into an integrated language research object.

It concludes that the traditional learning method,reciting,should be given a second look from the perspective of the language meme.

This paper illustrates with examples the positive impacts of linguistic memes on cultural evolution,such as passing on traditional culture,promoting cultural improvement,developing multi-culture,absorbing foreign culture and so on.

During the process of imitation,copy and spreading,linguistic memes embody the following characteristics: the selectivity of imitation,the periodicity of copy and the variability of spreading.

In addition to their characteristics, linguistic memes in the process of replication and transmission are influenced heavily by human mental factors.

In the process of using language,linguistic memes may bring about obvious rhetoriccal effects,and this paper introduces,first of all,the repetition and analogy as representations of memes in the course of their replicating and transmitting,then discus.