Regarding COVID-19, Korea is implementing a quarantine policy by introducing social distancing in stages. However, regarding the stage of social distancing in recent, the government has announced a relaxed standard of social distancing taking into account the economic situation. The purpose of this study is to examine how the situation of COVID-19 in Korea changes according to the relaxed standards, and how the changed standards affect the economic situation and the situation of covid-19. By referring to the overseas SEIR model, Korea's situation was entered, and a variable called social distancing was added to see the difference between the existing standard and the relaxed standard of social distancing. As a result of the study, the changed social distancing increased about 50,000 people compared to the number of infected populations of the existing social distancing, and the recovered population also increased more than twice. These results are considered greater than the risks that the Korean government can afford and may lead to a shortage of Korean medical resources.