Netizens of college students are playing multiple roles in spreading Internet public opinions. They act as information sources, communicators as well as audiences, etc. This research constructs a seven-dimensional model to describe how netizens of college students participate the public sentiment spreading. The survey reveals the communication contents, channels, outcomes, as well as the characteristics, psychologies, altitudes and desires of the participants in the spreading course. Based on this survey, the researchers come up with some advices to tackle with current situations.