Buyi Sihu is a bow and stringed musical instrument of the Buyi and Miao nationalities. The Miao people are also called Sixian Hu. Popular in Guizhou Province, Qiannan, Qianxi Nan Buyi and Miao Autonomous Prefecture.

The Bouyei Sihu is the same as the Yi Sihu, but the body is smaller. The qin barrel is cylindrical, hollowed out with bamboo or paulownia wood, and the specifications are different, depending on the player. The front mouth is covered with python skin or sheepskin, and the back is open. There is a gallbladder inside the piano barrel, which is coiled with a steel wire, which can make the instrument emit beautiful timbre and long reverberation.

The piano bar is made of hard miscellaneous wood, and the total length is only 35 cm. Some headstocks are carved into dragon heads, chicken heads or birds as decorations. Four axes are set up. Zhang has four silk strings, the first and third strings are a group, the second and fourth strings are a group, and the fifths are set as c1, g1, c1, and g1. Sound range c1-c2.

When playing, the left hand holds the qin and presses the strings, and the right hand holds the thin bamboo-tethered double-haired bow to play. The bow hairs are sandwiched between the first and second strings and the third and fourth strings respectively. Only use the first position, do not switch to play. The sound is soft and loud. Can be used for solo or accompaniment.

Buyi and Miao people often play to entertain themselves during festivals and slack, and they are also the accompaniment instruments for folk songs and Buyi opera.