力挽狂澜

lìwǎn-kuánglán

[to make herculean efforts to save a critical situation; make vigorous efforts to turn the tide; do one's utmost to save a desperate situation] 比喻控制猛烈的潮流, 挽救危险的局势

中流砥柱, 力挽狂澜, 具大才, 立大业。 --《秋瑾集》