Abstract: Depending on the survey of 208 households in Fifth Division of Xinjiang Production and Construction Corps， we used DEA\|Tobit two stage analysis framework to study the farmers technical efficiency and its influencing factors under the constraints of low carbon. The results showed that: firstly， farmers technical efficiency was improved under the constraints of low carbon， and the efficiency of the wheat was generally higher than that of cotton. The technical efficiency of small\|scale farmers was improved， while the technical efficiency of large\|scale farmers was reduced. Secondly， the internal factors which lead to the farmers technical inefficiency was the input redundancy. Among them， the main investment redundancy of cotton were pesticides， plastic film， irrigation， agricultural machinery， the main investment redundancy of wheat were labor， pesticides， agricultural machinery. At the same time， we found that farmers age and educational level had positive impact on technology efficiency， households planting time had a negative impact on technical efficiency， the sizes of family and labor force had no significant impact on technical efficiency.

Key words: carbon emissions, DEA\, Tobit model, farmers technical efficiency