The Islamic Maghreb owes its civilization to its geographical location, which, in addition to simultaneous access to the Mediterranean Sea and Europe and the pristine lands of sub-Saharan Africa, has also benefited from Egypt's proximity to the East Gate. Such a situation has provided a favorable opportunity for business activities, and of course, it is natural that the degree of actualization of this capacity has always been a function of other variables, especially political variables. The study of the evolution of trade in the Maghreb in the Middle Ages (5th to 10th centuries AH) confronts us with a different phenomenon; in this period, despite the change of governments, political decentralization and constant war, we face the growth of all trade indicators. The present article examines this contradiction; It is argued that the existence of dynamic markets, powerful coinage, and the easy and extensive movement of merchant caravans are clear signs of medieval trade flourishing in medieval Maghreb, and The reasons, in addition to the geographical location, are that the governments of the region knew that with strong treasuries, they would have more and more satisfied military power and strength to rely on political conflicts, and the realization of a rich treasury will not be possible except through prosperous trade. This article has finally been able to show the existence of this dual political-economic life, so that we always see the consistent policy of the governments of this region in supporting trade facilitation in spite of all political crises.