The definition of Gregorian chant in one simple sentence is: Catholic liturgical music named after Pope Gregory I, called Gregorian chant because of its solemn expression , simple style is also called plain song. It should be said that it is the source of the history of Western professional music. It not only has religious and cultural functions, but also breeds the buds of professional music. Without understanding the artistic tradition of Gregorian chant, one cannot fully understand the development of music history (Chai The ancient hymn melody "Lord, save your people" is used in the introduction and ending of Kovsky's "1812 Overture").

Catholicism has recognized the role of music in faith from the beginning, making music play an important role in religious liturgical activities. The so-called chants (chant) are formed when scriptures are sung. The formation process of Gauli Chant is also very complicated. Let’s take a brief look at it.