The double-pipe reed is a single-reed air-singing instrument of the Dai and De'ang peoples, consisting of a speaker, a sound tube and a reed.

The speaker is mostly made of a waistless whole gourd, the bottom is drilled to remove the seeds, and a thin bamboo tube is inserted into the gourd handle as a mouthpiece. The sound tube is made of two bamboo tubes with different thicknesses, the upper end is closed, the middle is transparent, the lower end is open, and the bottom end of the gourd is inserted in parallel. Each sound tube inserted into the gourd cavity is inlaid with a reed, the reed is made of copper or copper-silver alloy, and the reed is carved on the reed frame, forming a 12° acute triangle.

The sound tube was sealed and fixed with beeswax. The thick and long sound tube is the main tube, the length of the tube is 25 cm to 37 cm, and the diameter of the tube is about 1.5 cm. ; The thin and short auxiliary pipe is only inlaid with reeds, without opening the sound hole, and can only emit a barrel sound, and is equipped with a piston, when the auxiliary pipe is not needed to sound, the auxiliary pipe can be blocked. The pitch and tone sequence of the sound tube vary by ethnic group and region.