Folk literature, or oral literature, is the forerunner of the written literature. Its orators were pure and reliable people who were not much literature. These folklores stayed with us through their transfer between generations. Part of the folk and oral literature is the "wedding songs" labelled differently in various parts of the country. In Fasa county, this type of literature is known as "Astunk or Wastunak". The present article examines the syntactic structure of this type of oral literature in terms of the type and components of the sentences in popular culture. To this aim, through field study and interview with older and preferably illiterate women, 127 Wastunaks from the folk culture of Fasa were collected and transcribed. They were, then, analyzed syntactically (type and components of the sentence). The data was fed into SPSS 25. The results show that the frequency of the simple sentences is more than the compound ones and in most compound sentences, the subordinates are omitted for the rhythm of the poems. Finally, the three-part and four-part sentences had the highest and lowest frequencies in the Wastunak, respectively.