The Hui Nationality practice the Islamic religion. In areas where there are dense distributions of the Hui people, mosques are built which hold religious activities hosted by imams. The main religious scripture of the Hui Nationality is the Koran and the believers of Islam are called Muslims. The Hui people live a very traditional Islamic way of life. They abide by all the religious rules such as not consuming pork. The Islamic religion has played a very important role in the growth and development of the Hui Nationality. Mosques are places for Muslims of the Hui ethnic group to have religious services and hold activities; some mosques also have the liability to disseminate religious knowledge as well as cultivate Islamic clerical practitioners. Mosques are considered a sacred place of worship by all Hui Muslims.

According to the Islamic calendar, on the tenth day of the twelfth month is Edi Al-Adha Day, or the Feast of Sacrifice. Every year on this day, animals such as camels, oxen and sheep are killed in sacrifice to their God Allah. Islamic precepts prescribe the ninth month on the Islamic calendar as the period of Ramadan, meaning a month of fasting. During this time, all Hui Muslims must abstain from all forms of drinks, food, and sex; the purpose of Ramadan is to make the people contemplate and reflect seriously on their own sins as well as make the financially rich people have personal painful experiences about caused by starvation. The period of fasting ends on the first day of the tenth month called Hari Raya Puasa noted by grand galas held to celebrate the accomplishment of the fasting activity. On this day, all Muslims get up very early, take a bath, light incense and then go to the mosque in formal clothes for a religious service and to listen respectfully to the lectures and sermons given by imams. After that, they go to their cemeteries and hold activities to worship and cherish the memory of the deceased, in order to show that they will never forget their ancestors.