＂Guangming leiluo （光明磊落 ）＂ is frequently used in daily life. It is usually used to describe the people who have the frank and open mind. There is a meaning as well as the relevant illustrations of this idiom in some large-scale Chinese dictionaries, especially in the Idiom Dictionary. Many of them also conclude a number of other forms of it. But there isn＇ t a consensus on the source of this idiom of which the course is still ambiguous. Based on above points, the author thinks that there is a necessity to study the origins of this idiom in order to clarify the process of its evolution and to search out the possible earliest source. We should do a spot work in one＇ s power for the compilation of dictionaries.