To investigate the weaving mechanism of a hollow circular disk weaving (HCDW) machine, a weft insertion model is established under three assumptions circled1 warp tension is kept constant in the weaving zone between the guide ring and the weaving point. circled2 the normal force generated between warp and weft yarn is sustained uniformly in the weaving zone. circled3 the forces used for crimp formation and yarn cross-sectional deformation can be ignored. In this study, weft yarn tensions and the frictional force between warp and weft yarns are mainly considered to simplify the theoretical approach of the weaving mechanism. Four governing equations have been established from the force and velocity equilibrium under the steady state condition during weaving process, as well as the geometrical relation. By substituting the boundary conditions in the equations, a mathematical expression of weft yarn path in the weaving process of the HCDW loom is derived and finally the weavability of the HCDW loom is evaluated with phenomenological feature.