A dezocine crystal form and a preparing method thereof

A dezocine crystal form is disclosed. The X-ray powder diffraction (XRD) spectrum measured by Cu/K-alpha1 of the dezocine crystal form has diffraction peaks at positions the 2[theta] values of which are 9.1 +/- 0.2 and 12.2 +/- 0.2, and the heights (%) of the diffraction peaks are greater than 20. A preparing method, a medicine composition and uses of the of the crystal form are also disclosed. The dezocine crystal form has not been reported, and has good dissolvability. The preparing method is simple to operate, good in reproducibility, suitable for industrial production, and the like.