Realistic films have now become an indispensable and important part of the global film genre. Based on the background of humanities and social sciences in China and South Korea, this paper analyzes how the creators of “Parasite” and “Sheep Without A Shepherd” pass through the film plots. The profound reflection of family relations and social contradictions, as well as the role relations and drama contradictions in the family, come to achieve a strong criticism of realism. Through the analysis of the plot setting and lens usage of the two national realism films “Parasite” and “Sheep Without A Shepherd” in China and South Korea, scientific references and suggestions are put forward for the development and re-creation of realism films in China and South Korea.