Abstract: The paper studied yield component trait of Shaan 2365 from fruit retention, number of fruit branch. Lint percent, seed index, boll weight and economics index of cotton boll. The results indicate that Shaan 2365 is more than 33B in all research factors. It’s growth Status is very well during every growth development stages, cotton-boll is bigger, lint percent is higher, flushing out is quicker, fruit abscission rate is lower. These were factors of high yield of Shaan 2365.