The purpose of this study was to investigate Chinese learners` Korean lateralization errors. To meet the goal, Chinese learners of Korean participated the experiment with 20 novice group(less than 12 months) and the expert group(more than 48 months). The data were analyzed by means of listening test and experimental acoustic test. The results showed that the mean rate of error was 72.0% for the novice group and 51.0% for the expert group with significant difference. It indicated that lateralization could be improved as the period of learning gets longer. However, the pronunciation of simple liquid sounds /ㄹ/ also was improved with the significant difference between the groups, which latralization errors might be somewhat ascribed to the Chinese learners` poor pronunciation of /ㄹ/. Errors are classified largely into two aspects：the first was errors caused by their spelling-based pronunciation due to their mother tongue pronunciation. The second aspect of errors was the application of the nasalization of liquid sounds rather than lateralization by the lack of understanding of the environment of lateralization.