Abstract
Completing the mechanism of controlling executive power (MCEP) is one of the crucial aspects in the process of building and perfecting the socialist rule-of-law state of Vietnam led by the Communist Party of Vietnam. During the process of State building, this mechanism has been gradually improved, making an important contribution to promoting socialist democracy. This article clarifies the necessity and content of perfecting MCEP in the context of the single-party system in Vietnam today. This article is the result of research on the project code KX.04.09/21-25.