Street vendors go on an essential role to fulfill the demands of many urban rural dwellers as well as pedestrian across the country and all over the world. The aim of this study is to explore the dynamics of small entrepreneurship and its contribution to poverty alleviation and sustainable livelihood. A quantitative oriented qualitative mixed method has been applied in this study. The study reveals that a large number of people are directly and indirectly engaged with the street vendor profession and are contributing to the economy of Bangladesh. Three ideas constitute the central message of this study. Firstly, a large number of people are generating income through street vending by which the ways and means for developing street entrepreneurship. Secondly, this small entrepreneurship has a great contribution to poverty reduction and sustainable livelihood of many street vendors. Thirdly, this study has explored the obstacles faced by street vendors in Bangladesh. Some problems of city dwellers are created by street vending such as lack of formalization, weak management system, producing street garbage and gathering crowd on the footpath. By the implementation of the proper public management system, street vendors would become a role model for the national economy.