Guangxi folk songs, as an important part of Zhuang and other minority cultures, carry deep historical and cultural heritage and national emotions. First, the music files of Guangxi folk songs are preprocessed to extract the main melody and harmony, and analyze their musical elements and structural features. Secondly, audio features and lyrics text features are extracted from Guangxi folk songs to form audio feature matrix and lyrics text feature matrix respectively. Then, a multimodal feature fusion correlation between Guangxi folk songs and Chinese national destiny community consciousness is carried out, and combined with the mapping matrix mechanism, a new matrix with fused multimodal features is obtained, which organically fuses the musical features and lyrics text features of Guangxi folk songs with the textual emotional features of Chinese national community consciousness. The melodic material has a significant effect in expressing the tranquil and sacred emotions of the Chinese nation, with the highest correlation coefficients of 0.72 and 0.71 respectively, and the scale material has a significant effect in expressing the sad, happy and passionate emotions, with the highest correlation coefficient of 0.74. The tempo of the musical elements is closely related to the emotion of the sense of community of the destiny of the Chinese nation, and the slow and heavy tempo of 60-80 bpm is closely related to the sadness, reflecting the Chinese nation's feelings in the face of challenges. The slow and heavy tempo of 60-80 bpm is closely related to the emotion of sadness, which reflects the inner sadness of the Chinese people when facing challenges and difficulties. The very fast and exciting tempo of 140-160 bpm is more likely to stimulate passionate emotions, showing the grandeur of the Chinese nation when celebrating victory and pursuing dreams.