THE ROLE OF EXTENSION WORKERS ON THE DEVELOPMENT OF CATTLE FARMING IN SANGKUB SUBDISTRICT Sangkub sub-district has natural resources and human resources that have the potential to support the development of cattle, however, the development of cattle in this region has not been carried out effectively. This study aims to determine the role of extension workers towards the development of cattle farming, as well as analyzing the relationship between the role of extension workers and the development of cattle in Sangkub subdistrict.Determination of village samples is determined deliberately (Puposive), Pangkusa village. The selection of farmer respondents was taken entirely from farmers in Pangkusa Village, which amounted to 61 people. Measurement of research parameters is done by applying Likert scale. Testing the relationship between the variable role of extension workers and the development of cattle farming using spearman correlation coefficient test. The results showed that the role of extension workers shows that the indicators of the role of extension workers are reviewed from several aspectsthat is, the main activities of counseling 100% good, the preparation of counseling materials 33.3% cukub good 66.6% is not good, the application of 100% support method is not good, livestock business development is 33.3% good enough 66.6% is not good, the monitoring of the principles and implementation of counseling 66.6% is good 33.3% is not good, 33.% skills are good 33.3% good enough, the role of extension workers as educators, mentoring, and advisors 100% good. In general the assessment of the development of cattle farms based on measured parameters indicates a varied value, most breeders (51%-69%) categorized successfully, and there is a strong relationship between the role of extension workers and the development of cattle farming, with rs correlation value = 0.6385 and z-count (49,457) > z-table (1,640). Based on the results of the study, it can be concluded that the role of extension workers is mostly in good categories, there is a strong relationship between the role of extension workers and the development of cattle farms in Sangkub subdistrict.