The double-pipe horn is a single-reed gas-sounding instrument of the Dai and De'ang peoples.

After the founding of the People's Republic of my country, our country's national musicians reformed the double-pipe languo. In 1958, Yunnan Song and Dance Troupe firstly designed and made a kind of horn bell with two supervisors and no assistant pipes on the basis of the traditional horn. more than an octave.

In the 1970s, a double-pipe four-degree horn was successfully developed. A copper gourd-shaped speaker is used instead of a natural gourd. The sound tube is made of plastic. The sound of the two tubes is four degrees apart. One sound range is c1-d2, and the other sound range is f1-g2. Various chords and simple polyphony can be played.