Church reforms carried out by Martin Luther centered on Christians who wanted to be saved from the teachings of the deviant Catholic church. One of Martin Luther’s thoughts in reforming the church is his unique understanding of the problem of sin and his acceptance of God’s presence. This research uses the library research method which is sourced from the works of Martin Luther and the text of the Holy Bible. The approach used by the author is the historical-historical approach (analysis-history), with this approach the writer can arrange and conceptually arrange the course of the history of the Catholic Church and Martin Luther. The purpose of this writing is to read the events that Martin Luther has done in reforming the church, he has a different influence on Christianity today. Their forms of belief differ from the way in which the Scriptures are conveyed. So the author can conclude that the ideas of Martin Luther appeared to submit 95 theses of criticism for the teachings of the church which according to him to deviate and after the success of Martin Luther in reforming the church. The church denomination was created after reforming the Catholic church. So some Christians feel worried about the denominations of the church around them that will only make them divided and united until now.