Abstract: Multi-axial warp knitting technology has been widely promotion and application in foreign,but it is in the initial stage at home． The loop structure of multi-axial warp knitting fabric has great effect on the material performance． This paper introduced research history about the model of the structure of knitted fabrics,and analyzed and discussed the loop structure of multi-axial warp knitting fabric in detail,including the geometry model of the single axial warp knitting fabrics,the bi-axial warp knitting fabrics,the unit cell model and the 3D model of the multi-axial warp knitting fabrics．

Key words: multi-axial warp knitting fabric, loop structure, geometry model, unit cell model, 3D model