Hehuanxiao (pinyin: Hé huān xiāo) is a kind of musical instrument of the Zhuang nationality, which is popular in the rural areas of southern Guangxi such as Yongning County, which is on the bank of the Yongjiang River in Guangxi Zhuang Autonomous Region.

The name of Hehuanxiao comes from two meanings related to "Acacia". One is to break the two halves of a bamboo pipe and then close it together, and the other is to accompany the folk songs called "Huan" in Zhuang language. Not only is the body of the two halves compatible, but also "happy" for its companions, so it is called the Hehuan Xiao. It is a musical instrument created by the Zhuang people based on local materials and combined with the tune of their own folk songs.

The acacia flute tube is a bamboo tube with sections at both ends. It is made of a locally grown bamboo called "single bamboo". When making, a bamboo tube with a length of about 60 cm and an outer diameter of 1.5 cm to 2 cm is generally used, but there are bamboo joints at both ends, and the tube body must be straight. In the center of the section at the two ends, a long through hole is opened in parallel, and along the two through holes, the bamboo tube is broken into two evenly divided halves, and then the two ends are closed as they are. Fastened with a rubber band, an acacia flute was made.

The pitch and range of the acacia flute are the same as the human voice, and it is full of singing, so the acacia flute has a strong national style and pastoral flavor.