the project deals on development and design of thresher machine which mainly used for paddy rice and wheat. This machine boasts a reasonable design, excellent manufacturing, easy operation method and low energy requirement that are from human being. The operation method is by kerosene motor It is a low cost machine used for efficient threshing of paddy or grain (removal of grains from the stalk) with reduced labor input and grain loss in crop residue. The Thresher machine is operated by one or two people’s power. It completely separates paddy or grains from the straw. The threshing capacity of this machine is 250Kg/hr paddy or grain. This capacity of the machine is measured when it is compared with the traditional method of threshing. The approximate capacity of the traditional threshing method is 35Kg/hr. The traditional threshing method is performed by beating the harvested grains by stick using hand. It is a hold-on type open thresher and cheap in price.