“Special Language Domain(SLD)”is a linguistic concept based on innovative language usages in special domains or areas.Previous studies under this perspective have fully demonstrated its unique value.This paper first introduces the background and basic connotation of SLD,and then points out problems after a review of relevant literature.Then,it introduces and shows the construction of the SLD corpus carried out by the team in recent years(including corpus collection standards and labeling standards,corpus classification standards,etc.).It also...