According to the demand of voltage adjustment module, a design and implementation of multi-function voltage adjustment module is presented. In this paper, at first, the principle of rapid voltage regulating function and realization is introduced. Then several other functions such as high phase limitation/over current protection/extend interface for digital protection/ voltage adjustment prohibition are presented. The design and implementation of multi-function voltage adjustment module has been successfully used in the control of industry/airborne AC generator. Practice has proved that the design has high operation reliability, low cost and good economic benefit.