Procrastination is very common among college students in China. Two types of chronic procrastination have been defined by Ferrari, O'Callaghan, & Newbegin (2005): one form was arousal procrastination (delays motivated by a "last-minute" thrill experience), another form was avoidance procrastination (delays related to fears of failure or success). Locus of control and time management disposition was considered as important factors associated with procrastination: time management disposition and external locus of control was significant negative correlated with procrastination, and internal locus of control was significant positive correlated. However, previous studies failed to distinguish different types of procrastination which were varied in motivations. The purpose of the present study was to provide a better understanding of the link between time management disposition and procrastination of arousal and avoidance types by examining the different mediate role of locus of control in the relationship by SEM. Six hundred and twenty four college students (329 males, 263 females, 32 unknown) from 7 universities in Beijing, Xi’an and Guiyang has been surveyed by complete 4 validated questionnaires (Adolescence Time Management Disposition Inventory; Internality, Powerful Others, and Chance Scales; Lay’s General Procrastination Scale for Student Populations and Adult Inventory of Procrastination) in classroom. Amos 7.0 was used to analyze the correlation and structure model among these factors. The analysis of correlation showed that time management disposition was significant negative related to both arousal and avoidance procrastination. That is, the more active of individuals’ time management disposition, the less they procrastinated in their daily life. As to locus of control, internality is significant negative related to both arousal procrastination and avoidance procrastination, while powerful others and chance were significant positive related to both arousal procrastination and avoidance procrastination. By delete several insignificant paths, a mediate model of 2 types of procrastination was confirmed by SEM after cross-validation (χ2/df(112.933/56)=2.017, RMSEA=.058, TLI (NNFI) =.950, CFI=.964, GFI=.947). The SEM indicated: (1) Different types of locus of control can be predicted by time management disposition, specifically, time management disposition can predict internality positively and predict powerful others and chance neg