The study aims to analyze the traditional perception of riparian populations on the spatial-temporal evolution and importance of the Manda National Park (MNP) in the Moyen-Chari Province, in order to contribute to the implementation of a participatory and efficient strategy for its sustainable management. To do this, a survey was conducted using a questionnaire with 211 people composed of forestry officials and non-officials from the four (04) townships bordering the park. The data collected concerned the evolution of the vegetation cover, uses, degradation of plant resources and their causes. The results show that the MNP has suffered from anthropic pressure, resulting in a regression of the vegetation cover in a global way from 2009 to 2019. The main causes of the decrease in vegetation cover are overgrazing, poaching, bush fires, logging and hunting. The main uses of MNP's forest resources are for food, fodder, energy fuel, and traditional medicine. The plant species most used for various purposes are Anogeissus leiocarpus (42.36%), Terminalia laxiflora (26.97%), Flueggea virosa (21.3%), Detarium microcarpum (20.11%) and Vitellaria paradoxa (19.70%). The four townships do not differ significantly from each other in the types of uses of forest resources and the causes of their degradation. The results of scientific studies obtained on the dynamics of the park's vegetation cover confirm traditional perceptions. Hence the importance of involving local populations in studies on the sustainable management of the park.