In Chifara kebele teff harvesting is traditionally done by using sickles. This method is laborious, ineffective, and requires a long time. The aim of this research work was to develop, fabricate, and test a pull type teff harvesting machine for use by farmers’ cooperatives in teff harvesting area. Price, simplicity, and long year serving conditions were considered as the main criteria for the development of the teff harvesting machine. It consisted of six main components including the cutting, transmission, power, handling, frame, and transporting units. A petrol engine that produced 3 kW at 7000 rpm provided power for the cutting unit. Design specifications, material selection and drawings were developed using Catia V5 from CAD Software and prototype was constructed after simulation and stress analysis were made. The performance evaluation of SEDTHM was done in Bahir Dar Metal production Center’s compound. The test was done on grass which is family of teff species (Eragrostis Zucc.) .This was due to absence of teff crop in vicinity area. Comparison was done with manual harvesting method. Comparisons done included manpower required (man-hr/ha), harvesting capacity (ha/hr) and harvesting cost (birr/ha). It was found that by SEDTHM average harvesting values of man-hr/ha, effective harvesting capacity and cost, were 5 hr/ha , 0.36 ha/hr, 460 birr /ha, respectively. While the average values of man-hr/ha, effective harvesting capacity, and cost for manual harvesting were 152 hr/ha, 0.0048 ha/hr, 3060 birr /ha, respectively. Hence SEDTHM harvesting was better for all performance measures done. It was recommended in future that the farmers use this teff harvesting machine to improve their productivity, work another job by the excess time required due to using SEDTHM, increase their income and develop their living standard.