The Mongolian Sihu (pinyin: měng gǔ zú sì hú) refers to the four hus popular in Mongolian areas. The shape is the same as the four hus in Han areas. It is popular in the pastoral and semi-agricultural and semi-pastoral areas of Inner Mongolia Autonomous Region.

The Mongolian Sihu is made of mahogany and red sandalwood. The barrel is mostly octagonal and covered with python skin or cowhide. The peg and the shaft hole have no taper. The tension of the string is used to press the shaft hole to fix it, and some are still in the piano. Rod and drum are inlaid with luotian patterns for decoration, thin bamboo is tied with horsetail as bow, the middle of the bow is covered with 10 cm long copper skin or inlaid with steel sheets, ivory, the root is equipped with bones or wooden knobs, and wire strings or steel strings are attached. . There are three types of bass, alto and treble.