Abstract:Young Engels' interpretation of the British workers' movement went beyond the narrow dimension of political economy, and had a rich ecological dimension. Based on an examination of the conditions of the British working class, Engels believed that the environmental oppression suffered by the working class stimulated their class consciousness and political potential; and the large city, as an environmental intermediary, provided a medium support for the formation of the working class. Thus, the realization of working-class ecological liberation must adhere to the ecological criticism of capitalism. Starting from the ecological foundation of the working class, Engels explored the theoretical way for working-class ecological liberation in the criticism of capitalism's anti-ecological nature, and opened up a new path for disintegrating capitalism. Engels' ecological dimension of the theory of the workers' movement, hence, is of great signifi cance for re-examining the subjective position of the working class, expands the domain of capitalist criticism, and deepens the theory of working-class liberation.