Experiments were carried out to compare some biological characteristics of invasive Frankliniella occidentalis (Pergande) and native Thrips tabaci Lindeman, including population growth rate, sex ratios, developmental duration，longevity and parthenogenesis. The results show that numbers of T. tabaci were almost three times that of F. occidentalis after three generations. The sex ratio（female/male）of F.occidentalis was 2.8∶1 but all T. tabaci were female. The developmental duration of T. tabaci was significant longer than that of F.occidentalis on purple cabbage, except for 2nd instar larvae and prepupae，however, its longevity was obviously shorter than that of F.occidentalis; 24.94 d (female) and 43.35 d (female), respectively. Although F.occidentalis females laid fewer eggs per day than those of T. tabaci, their ability to reproduce parthenogenetically allowed them to lay significantly more eggs over their lifetime.