This paper studies the application of big data technology in current smart anti-smuggling, covering an overview of big data technology, the connotation of smart anti-smuggling, and its significance. It analyzes the application status in the new era, takes X Coastal and H Border Customs Anti-Smuggling Bureaus as examples to demonstrate practical effects, identifies existing problems (low data integration efficiency, inadequate interconnection, shortage of professionals, and imperfect institutional mechanisms), and puts forward relevant suggestions to promote the sustainable development of big data technology in smart anti-smuggling construction and application.