The song and dance music in folk dance is generally developed from local folk songs and minor tunes, combined with the characteristics of song and dance. The combination of song and dance may make the folk songs in singing and dancing more rhythmic and rhythmic, such as Yunnan Lanterns, Uyghur Sai Naim, etc.; or it may make certain songs and dances alternate. Folk songs in the form of singing and dancing add musical means and expand musical expression, such as the juxtaposition of slow songs and fast songs in Tibetan songs and dances.

In addition, the addition of instrumental preludes and interludes not only highlights the cheerful rhythm and active atmosphere of

singing and dancing music, but also gives the dance performance prompts and time to simply show off the dance postures. . It can be said that the comprehensive art of combining song and dance in folk songs and dances has enhanced and expanded the scope and expressive power of song or dance, so it is loved by the people.

The instrumental accompaniment of folk dance music often uses folk songs and ditty music, such as the accompaniment music of the Korean patriarch’s drum dance.

When percussion instruments appear as props in dance, such as the long drum of the Korean people, the elephant foot drum of the Dai people, etc., on the one hand, the action of drumming enriches the dance. vocabulary, on the other hand, complex drum beats and exciting drum sounds are more likely to arouse the audience's screams.

Instrumental accompaniment plays an important role in both singing and dancing music. The percussion music in dance often has fixed gong and drum beats. The drum beats not only serve as accompaniment in dance, but also can predict the different dance postures and formations of the performers.

There are different combinations of accompaniment bands for folk dances. The accompaniment of lyrical and beautiful dances is often dominated by silk and bamboo music, while the accompaniment of vigorous and rough dances is often dominated by percussion music. Suona and drums play a very prominent role in the accompaniment of folk dance music. They can create a warm and prosperous atmosphere, which is consistent with the atmosphere of festivals and festive gatherings where folk dance performances are performed.

Folk dance music often adopts a regular I or beat, and often starts and ends with a downbeat. The harmonious rhythm is common in the dances of the Korean and Bi ethnic groups, and the harmonious rhythm is common in the dances of the Uyghur and Tajik ethnic groups.

Folk song and dance music that combines song and dance has the following structures:

Single section - singing multiple sections of lyrics to a folk song melody, singing and dancing repeatedly.

'This form retains more of the original form of folk songs, and adds introductions and transitions (i.e. interludes) to meet the needs of dance. ? Alternating songs and dances - this form appears in dances that are performed without dancing and danced without singing, such as Tibetan Duixue.

Song and dance suites in the form of couplets - linking several songs together to form contrasts in mode, tonality, rhythm, speed, etc., making the music richer and more vivid.

For example, the Han people’s lanterns and tea picking, the Uyghur’s Muqam singing and dancing and Sainaim, the Mongolian Andai dance, etc.

Fixed gongs and drums and gongs and drums brands - this is the form of percussion accompaniment in dance music, and it is also a sign that the instrumental music forms an independent section. Some folk dance instrumental passages

have developed to a quite mature stage, with complex and superb skills.