Abstract: Cotton area of Xinjiang becomes one of three cotton big area of china. It is grievous that more and more bollworms disserve cotton recently. Primarily penman studies on Growth Regularity (generational characteristic) of Transgenic Bollworm-resisting Cotton, for transgenic bollworm-resisting cotton are used and developed in Xinjiang. And the result is as follows: Early-maturing transgenic bollworm-resisting cotton grows slowly in earlier stage and grows quickly in later stage. The boll stage of transgenic bollworm-resisting cotton is long. By comparison with local early-maturing cotton variety, during the course of boll growth early-maturing transgenic bollworm-resisting cotton boll reach the maximum fresh weight 7 days later, lost water slower , increase volume and dried weight the same as it; ginning outturn is lower; in a day the maximum photosynthesis rate appears later, furthermore, the maximum value is lower. The results of study on growth regularity of transgenic bollworm-resisting cotton indicated: It gives priority to provide abundance fertilizer and water to accelerate cotton planting growth in early stage and regulate fertilizer and water to avoid serotinous in later stage.