It remains in China an underresearched issue on the evolution of labour control and struggles prior to the ROK's democratic transition in 1987.Labour struggle in authoritarian ROK followed a course of development under the dual effect of labour control by both the authoritarian government and the capitalist class.Control and experiences of struggle from a previous stage could shed influence upon their counterparts in successive stages.Apart from this，other reasons can include a change in the strategy of industrialisation，and a transformation of the authoritarian governance.The concerted effect of these three factors had led to continuous changes in labour struggle and control，until the full breakout of labour struggle after the Declaration on June 29，1987.