This research was conducted in Simalungun District. Instruments are tools used to collect data to be efficient and systematic. The research instrument used is questionnaire. The data collected were tested using path analysis. The path coefficient of sustainability influence to red chili farmers is 0.860, where the structural equation can be written as follows: Ŷ = 0,860 X, R-square = 0,739 and Ŷ = 0,430 X, R-square = 0,169. Direct effect of sustainable agriculture (X) on the welfare of farmers (Y) by 0.860. Development of sustainable agriculture to increase the highland vegetable farming income in the agropolitan area in Simalungun Regency will be possible to be realized by improving the quality of human resources (community), and empowering the community through various counseling, training and coaching programs conducted in an integrated manner, improve the quality and skills of farmers. Establish cooperative relationships and develop business partnership patterns to distribute agricultural products, in order to achieve maximum productivity and income
