The life table statistics of diamondback moth on the transgenic Chinese cabbage (line: SKCP) with myrosinase gene was compared with that on the non transgenic Chinese cabbage (line: SC) at 25±1℃. Adult life span and number of progeny of P. xylostella on the SC and SKCP lines were similar to each other. The sex ratio, developmental period, intrinsic rate of increase and finite rate of increase of P. xylostella on SC and SKCP were not significantly different in both treatments (sex rati t=-1.60; df=220; P=0.1108, developmental period: t=-0.55; df=220; P=0.5803, intrinsic rate of increase: t=-0.11; df=45; P=0.9172). However, the finite rate of increase and net reproduction were significantly different in between SC and SKCP lines (finite rate of increase: t=2.26; df=45; P=0.0287, net reproduction: t=2.08; df=45; P=0.0442). This work was supported financially by Biogreen21 project of Rural Development Administration (No. 20070301-034-010)