Fiqh al-Sharia is considered the link between the reality of people and the judgments of the wise Street according to the evidence on which it is based (the science of origins), through which the appropriate provisions are derived to be used in solving the facts developed in the cases and facts of people through the ages (fiqh al-nawazel), which made this Fiqh a valid industry to produce provisions and rules in line with the law of Allah Almighty and achieve the interests of worshippers in Therefore, this research tried to highlight the reasons for the continuation of this industry, reveal the elements of its success and validity, and its ability to respond to the requirements and needs of issues of the contemporary human society, and concluded that the Fiqh industry contributed to the formation of an integrated Islamic civilization in all its aspects, political, social, economic and cultural, which is the secret of its survival and continuity