Nowadays automatic power plant start- up and shutdown system is applied more and more widely. Based on the analysis with the need of feeding water system

a design optimization scheme is proposed in the paper. Applying the scheme

according to the feeding water mode chosen by the operation staff choosing in advance（ by steam pump or electric pump）

automatic start-up and shutdown system runs automatically and sequentially or each function groups runs in parallel

which takes into account the needs of two kinds of feeding water supply modes

and enhances the adaptability of the units operation conditions.