This paper investigates the causal interrelationship between export earnings from Dhaka International Trade Fair (D1TF) and GDP growth for Bangladesh using annual data from 2010 to 2018. The study analysed the achievements of the economy in terms of a leading variable as export. It used Pearson Correlation and Simple Regression Model for empirical findings based on secondary data. Since local and international business are explored together in the fair, there is a tremendous opportunity for our producers particularly exporters to meal their products and achieve the market share of global business. The study found that international trade fair has a significant impact on a nation k economic growth (GDP) and by the positive and strong initiatives of authorities, organizers and Government, in future, DlTF can be turned into a successful and large economic agent for export earnings and income growth of Bangladesh.