History in this age needs to record and analyze the events in the light of modern concept of contemporary world. When the historians narrate the brutal condition of Indo-Pak history, they never forget the work and services of Shaykh Ahmad Sirhindi to transform the society according to the current values. For his services, he is hailed as Mujaddid Alf-I-Thani (reformer of the second millennium). The Muslim society had degenerated when Mujaddid Alf-I-Thani appeared on the horizon. A number of Hindu customs and practices had become the part of their creed. The commandments of Shariat and Sunnah were being floated. Moreover, the Mughal emperor Akbar had adopted controversial policies detrimental to the very existence of Muslim society. Mujaddid Alf -Thani made strenuous and constant efforts to turn the tide. When Mujadded-Alf-Thani started his social reform movement, he found that the Muslim society was embracing un-Islamic practices such as widespread belief in Karamat (miracles of saint) had developed under the influence of Hindu thinking. Moreover, the Islamic teachings had been vitiated by adopting customs and practices of other religions such as inter marriages between Hindus and Muslims and ban on cow slaughter etc. Shaykh Ahmad Sirhindi never entered into any political conflict directly. He endeavored to restore pure doctrine to Islamic thought and to compel the Muslims to follow Shariat and Sunnah in letter and spirit. He was a social reformer, great Alim, Sufi and Mujaddid. He initiated a process of social change, inspired by Islamic Ideal, in an age, which was becoming secular. This research paper is an attempt to mention the role of Shaykh Ahmad Sirhindi for saving the society from un-Islamic values and customs in the sub-continent and its impact on society. By utilizing the historical method, this paper aims at analyzing the effect of social reforms of Shaykh Ahmed Sirhindi (1564-1624) on Muslim society.