Novel nanotubes of β-CD with barium 3-nitro-1,2,4-triazol-5-onate （(NTO)₂Ba) were prepared using β-CD recognition of (NTO)₂Ba. The morphology and structure were characterized by IR,¹³C-NMR,elemental analysis,flame atomic absorption spectrometry and SEM. The results show that (1) the molar ratio of β-CD and(NTO)₂Ba of inclusion compound is 1：1; (2) the nanotubes are tetragonal lattice with the diameter of about 48 nm and the length of about a few centimeters,and grow along ［001］ axis; (3) the mechanism of the inclusion compound is presumed.