The research about the phenomenon of informal economy so as to cover the large number of activities that differ from one country to another was to clarify the concept of the informal economy and standards, and to try to measure the size of the informal economy in order to clarify the relationship between the informal economy and the export and import movement in Syria. In order to achieve the objectives of the research was descriptive analysis of the phenomenon of informal economy and statistical method for data analysis through SPSS. One of the most important findings of the research there is a strong correlation between the informal economy and exports and imports of Syria.