The castor seed extraction machine, extracts the castor seed from the castor fruits without damaging and with clean approach. The machine consists of two major compartments, the shelling unit & the dehusking unit. A blower and cyclone was incorporated to facilitate easy & proper cleaning & separation of the seed from the chaffs. It uses a single phase 3 hp electric motor for the machine power requirement. In the present invention we use a design that automatically performs the operation without any manual efforts. According to this, we specially designed the crusher that impacts only that much of force which will not damage the seed and easily shells the castor, for the better performance we used a special purpose sieves for separation of husk. Its silent features are easily portable it prevents the air pollution caused due to its dust particles. Following invention is described in detail with the help of Figure 1 of sheet 1 showingthe construction of the mechanism developed for seed extraction machine.