Tourism promotion activities have become an extremely effective tool to attract and persuade visitors to tourist destinations, which is a very essential factor in promoting tourism development. Therefore, tourism promotion is becoming a hot issue in tourism development in today's destinations. Because of the fact that in developed countries, tourism has been quite successful thanks to tourism promotion activities, contributing to the better development of the tourism industry. The promotion of tourism is considered as one of the key tasks of Vietnam's tourism in general and the tourism of provinces and cities in the country in particular. This study clearly shows the role and importance of tourism promotion law in promoting tourism development through the practice of Binh Duong province; from there, proposing solutions to improve this law.