Abstract: The research situation of the maintenance technologies of 9E gassteam combined cycle peakshaving unit at stop and standby periods and existing problems were introduced. According to the anticorrosion mechanism, the maintenance method suitable for a company unit under complex and changeable stop and standby states was found by experiment. The implementation of the method shows that the method is rational and effective and has good applicability, and better economic benefit and social effect were obtained.

Key words: peak shaving unit, gas-steam combined cycle, maintenance technology, research