力挽狂澜（力挽狂瀾）　

◎ 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》