It is said that work will be easier when men and women work together, which is a social phenomenon of public knowledge. Does female staff really improve the overall team production performance? This paper establishes a theoretical model that male workers generate gender diversity effect to obtain females' goodwill and then improve overall team production performance, and makes an empirical test at industrial and provincial levels. It arrives at the conclusions as follows:firstly, after controlling the possible influencing factors, the rise in the proportion of female workers can improve industrial total factor production efficiency, proving the existence of the gender diversity effect; secondly, occupational gender segregation limits women' employment opportunities and inhibits the promotion of production efficiency. Therefore, the governments should guide enterprises to find and use the gender diversity effect, spontaneously improve the employment quantity of female workers, and fundamentally eliminate gender discrimination.