地下经济是各国经济发展中普遍存在的经济现象，也是经济发展过程中的一大难题。无论在经济发达国家，还是在经济欠发达国家，地下经济的研究都是从 80年代后期才开始的新领域。在我国，地下经济的研究起步更晚，至今一些地下经济的基本问题没有形成共识，在方法和体系上也没有 Underground economy is a ubiquitous economic phenomenon in the economic development of all countries and is also a major challenge in the economic development. In both economically developed and economically underdeveloped countries, the study of the underground economy is a new area that began in the late 1980s. In our country, the study of the underground economy started later, so far some of the basic problems of the underground economy did not reach a consensus and there were no methods and systems