Logistics platforms and reverse logistics are the most used solutions addressing daily problems in urban areas such as noise, pollution and cost. Their main goal is to ensure sustainable development in modern cities. The paper proposes an approach based on forward and reverse flows in urban logistic. To that end, we present a location-allocation of logistics platforms in a reverse logistics system. We, then, locate allocation and evaluate their effect on logistic platforms. In doing so, we present a mathematical model of the city logistics platform to specify location-allocation problem. Our model considers both flows: urban freight and reverse logistics. Subsequently, we improve city logistics platform’s financial situation by reducing operating costs. Finally, we use a numerical algorithm for optimization and illustration purposes.