Antimony (Sb) quantum dots doped in sodium borosilicate glass are synthesized through sol-gel method using tetraethyl orthosilicate(TEOS), boracic acid, and metallic sodium as precursors. Ultraviolet-visible (UV-vis) absorption spectrometer shows that the surface plasma resonance absorption peak of the quantum dots glass is about 566 nm. Nonlinear optical properties of Sb quantum dots doped glass are investigated by using Z-scan technique at the wavelength of 800 nm with femtosecond Tisapphire laser radiation. The values of nonlinear refraction index γ, nonlinear absorption coefficient β and the third-order nonlinear optical susceptibility χ(3) of the glass are estimated to be 8.59×10-17 m2/W, 1.80×10-10 m/W, 4.75×10-11 esu, respectively. X-ray powder diffraction (XRD) analyses reveal that Sb quantum dots with rhombic hexahedron phase are successfully doped in glass substrate. The size and distribution of the quantum dots are measured by transmission electron microscopy (TEM) as well as high-resolution transmission electron microscopy (HRTEM), the results show that spherical shape have formed uniformly in the glass, and the size of these quantum dots rang from 19 to 25 nm.