Structure, composition and control system of a novel automated balancing machine which can realize automated measurement and correction are introduced. A data acquisition card is used to obtain the real-time unbalanced signal. The magnitude of rotor’s unbalance and the mass need to be removed is calculated according to the unbalanced measurement principle. Then the feed which is needed to complete the correction is deduced. The AC servo motors with high precision and fast response are used to achieve fast and accurate unbalance measurement and correction. A prototype according to the principle is manufactured to test the thinking. Experiments proved that the unbalance reducing rate at one time correction more than 95%. It is necessary to further industrial development.