The colleges should enhance their honesty education to cope with the increasing dishonesty phenomena of college students. While in online education,the online instruction process is the main path to carry out honesty education. This article analyzes the various dishonesty phenomena existed in online instruction,and puts forward some pertinent countermeasures,including:to teach the knowledge about academic honesty,to establish detailed regulations for learning activities,to carry on the regulations strictly,to publish studying analysis reports regularly,to make effective plagiary detection methods,and to establish the personal credit archive of students. The instructional practice indicates that the dishonesty phenomena can be obviously reduced through sustained and active honesty education.