This study explores and analyzes the relationship between Vietnam and North Korea since the beginning of the 21st century, in the context where both countries have opted for different foreign policy strategies following the Soviet Union's collapse. Vietnam has conducted economic reforms and openness under the "Đổi Mới" policy while maintaining a one-party political system, whereas North Korea continues on a path of isolation with its policy of nuclear weapons development under the constraints of international sanctions. The relationship between Vietnam and North Korea has experienced many fluctuations, particularly after Vietnam established diplomatic relations with South Korea in the 1990s. However, since the beginning of the 2010s, this relationship has gradually been restored and strengthened through high-level visits and cooperative initiatives. Vietnam has played the role of a mediator, not only reducing tensions on the Korean Peninsula but also supporting North Korea in its process of international integration. The study emphasizes Vietnam's role in promoting regional stability and development, while facing challenges and opportunities in balancing relationships between North Korea and other countries such as South Korea and the United States. Through this, Vietnam not only strengthens bilateral relations but also contributes to the process of innovation and international reintegration of North Korea.