Chinese character writing is one of learning difficulties for Korean learners of Chinese as a second language. There are not many studies on the stroke writing of Chinese characters by Korean learners of Chinese as a second language. Based on the elementary handwritten Chinese characters in the “Chinese Proficiency Grading Standards for International Chinese Language Education”, this paper conducts a stroke analysis, and combines the whole-process interlanguage character database and the interlanguage text corpus of international students to conduct an investigation, and explores the problems existing in the Chinese character strokes of Korean learners of Chinese as a second language. The research results show that elementary handwritten Chinese characters with 7 strokes or less account for 60% among elementary handwritten Chinese characters, and these Chinese characters are easy for learners to acquire. The error rate of Chinese characters with 1-7 strokes is 2.8%, while the error rate of Chinese characters with 8-14 strokes is 6.4%. The error rate of Chinese characters with 8-14 strokes is significantly higher than that of Chinese characters with 1-7 strokes. This paper analyzes the causes of the writing problems and puts forward suggestions for teaching character strokes, hoping to provide effective help for teachers, thus helping to improve the Chinese character writing level of Korean learners of Chinese as a second language.