Based on the investigation materials to 33 paddy rice breeding scientific researchers in 9 family level agricultural centers of Jiangsu Province,this article builds a Tobit model and analyzes the influence that the individual characteristic has to the breeding behavior.The result of the model analysis indicates that individual characteristics such as age,working period,sex,whether holding the post of the administrative duty and so on have remarkable influence to the scientific research time of scientific researchers.The attempt of breeding organization marketability direction reforms adopted in the basic unit agricultural center makes it adapt the seed industry marketability reform ahead of time.So it doesn't bring a more tremendous influence.