The call of Sheikh Usmanu bin Fodiyo is based on the Book of Allah and the Sunnah of His Messenger, may Allah prayers and peace be upon him, on understanding the righteous predecessors from the Companions and those who follow them, and on fighting polytheism and its people, warning against satanic heresies and avoiding its people, and rejecting the pre-Islamic customs and traditions inherited from. God and His Messenger, and progress are in their hands. The Almighty said: {O those who believe, do not advance before Allah and His Messenger, and fear Allah, for Allah is All-Hearing, All-Knowing.} [Al-Hujurat: 1].In this humble research, the researcher will highlight the efforts made by Ibn Sheikh Usmanu bin Fodiyo in fighting these innovators, the methods he used to respond to them, and that - God willing - in the following points in this research: include Introduction. The definition of Bid?a, according to Ibn Fodiyo. Categories of Bid?a and evidence that they should be avoided. Types of Bid?a and its characters. Conclusion.