The researches of Korean scholars in Korea dynasty on Shuowen were overall investigated and analyzed in this paper.The main contents,the Significance and value of those researches were studied and discussed. The study herein found that the researches of Shuowen were conducted mainly during the late of Korea dynasty, the Korean Scholar were brave to question and criticize on shuowen due to Shixue influences. Their researches have achieved fairly high level both in broadness and deepness and affected many scholars afterward. This paper aims at describing whole pictures of researches on Shuowen in Korea Dynasty, highlighting their achievements and pointing out their shortcomings.