The choice of the economy of the rent in the mining sector for a sustainable development as problematic which is essential in view of the exhaustibility of minerals, the effects of their exploitation methods and their consequences on the environment. This study answers the question of the economic choice that the DRC must make in order to achieve sustainable development from its mining sector. By taking the merits of the mining code of 2002, initiative of the World Bank and the International Monetary Fund; and the innovations of the revised code of 2018, initiative of the Democratic Republic of Congo government, we propose the complementarity of the rent economy (code 2002) by a mixed economy. The state should not be satisfied only with the revenue from the exploitation of its minerals by foreign private mining companies, but also from the production deriving from the exploitation of Congolese public and private companies. The aim is to revive national production alongside foreign private production, condition for an inclusive economy, for sustainable development.

Mining investments and sustainable development in Democratic Republic of Congo is question that alerts disciplines like economics sciences, public international law, sociology and international relations. Democratic Republic of Congo abounds enormous potentialities in its soil and subsoil. She modified its mining exploitation methods when facilitating small scale investissments whose technology compete those of big scale investments. Preoccupation is the cobtribution of these investments in sustainable development in Haut-Katanga. Case study of four big scale investments and four other small scale investments inspired this study including TENKE FUNGURUME MINING, KAMOTO COPPER COMPAGNY, MINERALS AND METALS GROUP, SOCIETE D’EXPLOITATION KIPOI for small scale asian firms including. CHEMAF, RUASHI MINING for big scale, it reveals that investment is a factor of economic growth and development made possible by mining fees and taxes. On the social front, some firms rehabilitated and constructed schools. Others firms produced some achievements for instance the big ophtalmological clinic, shalina Eye Clinic. On the environment front, some firms are engaged to reduce negative impacts on environment of which toxic wastes are treated and evacuated to big highly secured bassin. In contrast, quantity of metals concentrated underground of others firms, is dangerous for very special plant species. Others again, provokes environmental problems because its factory stagnate due to lack of canalisation structure. Mining investments impact on sustainable development in Haut-Katanga, in economic, social and environment levels.