Abstract: This research is a survey of 60 subjects selected from 500s mobile phone addicts. Then the impulsiveness scale is adopted to carry out the experiment on 60 subjects to explore the behavior characteristics and mental mechanism of impulsiveness on mobile phone addicts. The results show that mobile phone addicts have got higher scores on impulsiveness total points, attention impulsiveness, motion impulsiveness, and unplanned impulsiveness; and significant relationships between mobile phone relying scores and impulsiveness behavior scores are observed and impulsiveness behavior may predict mobile phone relying behavior to some extent.