This study aims to determine: To determine the development of Arabica Coffee (Coffea arabica) production over the last 5 years, to determine the availability of production factors (land area, seeds, fertilizers, pesticides, equipment, and labor) for the development of Arabica Coffee (Coffea Arabica, for knowing the relationship between the availability of production factors (land area, seeds, fertilizers, pesticides, equipment, and labor) in the previous year to the production of Arabica Coffee (Coffea arabica), and to determine the business sustainability index of Arabica Coffee (Coffea arabica) viewed from the economic, social aspects and the environment in the research area. The research was conducted in Purba District, Simalungun Regency, where the sample size was 25 Arabica coffee farmers. Data analysis used qualitative descriptive analysis, OLS (Ordinary Least Square), and sustainability index. The Arabica coffee production development index from 2015-2019 decreased from the total production of 555.98 tons to 497.51 tons or the index value decreased by 75The availability of production factors (land area, seeds, fertilizers, pesticides, equipment, and labor) for the Arabica coffee development index in the study area is available with an average value of 21.17. , fertilizers, pesticides, equipment and manpower) the calculated F value = 0.566 0.05. In partial land area, seeds, fertilizers, pesticides, and labor have an effect on Arabica coffee production. the average (79.27) is categorized as very sustainable.