After the Third Plenary session of the Sixth Chinese Communist Party, He criticized the wrong idea of Left opportunism represented by Wang Ming.

• 在土地革命战争初期纠正了党内的“玩弄暴动”的错误倾向；在中共六届三中全会后，瞿秋白又批判了米夫、王明等人的“左”倾错误论点。