The great national unity is a great spiritual value, an extremely precious tradition of our nation, which has been molded during the thousands of years of struggle for national construction and defense. Solidarity has become a great motivation, a philosophy of life and action for our people to overcome many incidents and ups and downs of natural disasters and enemy sabotage, to survive and develop sustainably. On the basis of Vietnamese revolutionary practices and world revolutionary practices, Ho Chi Minh’s thought was soon formed about great national unity. This study focuses on analyzing Ho Chi Minh’s view on the need for national unity, the role of national solidarity for the Vietnamese revolution and the application of this ideology by the Communist Party of Vietnam in the current period.