Based on the survey,this paper analyzes farmers’ perception and use of genetically modified cotton (GM Cotton) and investigates farmer’s perception and participation of genetically modified technology rules.The results show that cotton farmers have low awareness of GM Cotton as well as its safety and relevant rules.Farmers obtain the seed information mainly from agricultural technician.Owing to the fund deficiency and disadvantages of management system,the current extention system of agricultural technology has got so much trouble that farmers will find it hard to get effective guidance and service of seed technology.In addition,poor supervision and shortage of relevant rules in seed markets not only harm farmers’ benefits but also increase the risk of farmers’ adopting technology.Therefore,this paper puts forward some corresponding suggestions on how to promote the technology extension of GM Cotton,such as understanding the decision-making behavior of farmers and making more reasonable and perfect technical rules.