The purpose of this paper is to investigate the impact of the entrepreneurship training on micro and small enterprises performance. Specifically, the study tests whether entrepreneurship training leads to success on Micro and Small Enterprises (MSEs) performance and whether there is a relationship between entrepreneurship training and the performance of MSEs. A sample of 60 food vendors from Ilala District was used to test the hypothesis before and after the training. Theoretically, the research questions and hypothesis were tested and data were presented using statistical parameters such as percentages, frequencies and correlations. the study findings reveal that proper entrepreneurship training leads to successful performance of MSEs. The key skills perceived to be the most importance by MSEs include financial, marketing, sector-specific technical and communication skills. The findings also show that there is a positive relationship between entrepreneurship training and MSEs successful performance. Based on these findings the study recommend that efforts should be made by the government and Business Development Services (BDS) providers to ensure and enhance availability of these training to all MSEs in the country for sustainable economic growth.