One of the obstructing factors against managing dairy farm been heavy labor requirement for feeding dairy cows. A Power-tiller TMF mixer was developed to reduce the cost and to provide economic benefit. The TMF mixer was designed by the feeding capacity of 20~30 heads at a batch with various functioning systems of auger type mixer, delivery conveyer, weighting console, pipe heater type heating system, power transmission train and mounting trailer. According to the study resulted, it showed that 1,200rpm, 1,600rpm, 2,000rpm and 2,300rpm were 6ps, 8ps, 10ps and 12ps respectively. and that reduced shaft output by 15% On the fodder mixer attached powertiller, initial output was necessary large torque. And the heating system was maintaining uniform temperature 60˚C relatively.