Xuanfu（玄府） refers to sweat pores in a narrow sense and pores

in a broad sense it refers to pores

orifices and channels

which are fine structure with the functions of operating qi movement

circulating blood and ve-ssels

and running spiritual mechanism. The author perfects the theoretical hypothesis of "Bone Xuanfu" and believes that the hollow structures such as holes

orifices and channels in bones

as well as blood vessels and lymphatic vessels with different shapes are the structural basis of "Bone Xuanfu". The "Bone Xuanfu" in periosteum

bone and bone marrow has physiological functions of running qi and blood

nourishing bones

communicating inside and outside

supporting movement

and pathological characteristics of easy stagnation

easy breakage

easy loosening and difficult recovery. In this paper

the theory of "Bone Xuanfu" is preliminarily discussed from three aspects such as periosteum

bone and bone marrow in order to provide theoretical basis for further understanding the pathogenesis of bone and joint diseases and to provide new ideas for clinical treatment.