Abstract: The phenomenon of Anti Spiral of Silence can be classified into rational and irrational ones. In public opinions battle, rational Anti Spiral of Silence always tries to achieve an agreement between online public opinions and social values; while irrational Anti Spiral of Silence tries to overthrow advantageous opinions to make public opinions deviate from social values. Measures should be taken to improve system of supervision and management over online public opinions in colleges to promote rational Anti Spiral of Silence and resist irrational Anti Spiral of Silence so that initiative can be taken to positively guide public opinions.