The novel spirophosphoroheterocycle (C14H19N2OPS2, Mr = 326.40) was synthesized by the treatment of Lawesson磗 reagent with amino cyclohexanenitrile, and its crystal structure was analyzed by X-ray diffraction method. The title compound is of monoclinic, space group P21/n with a = 14.296(4), b = 11.028(3), c = 21.715(6) ? ?= 101.823(6), V = 3351.1(2) 3, Z = 8, Dc = 1.294 g/cm3, ?= 0.71073 ? (MoK? = 0.410 mm―1 and F(000) = 1376. The structure was refined to R = 0.0521 and wR = 0.0744 for 5909 observed reflections with I > 2(I). X-ray diffraction analysis reveals that there are three rings in the molecule. The saturated 6-membered ring presents in chair conformation and the 5-membered phosphoroheterocycle is planar. The molecules are found to exist in couples. The existence of d-p?bonds between P and two N atoms and the intermolecular hydrogen bonds are found as well. The novel spirophosphoroheterocycle (C14H19N2OPS2, Mr = 326.40) was synthesized by the treatment of Lawesson 磗 reagent with amino cyclohexanenitrile, and its crystal structure was analyzed by X-ray diffraction method. The title compound is of monoclinic, space group P21 / n with a = 14.296 (4), b = 11.028 (3), c = 21.715 (6) = 101.823 (6), V = 3351.1 (2) 3, Z = 8, Dc = 1.294 g / cm3, (MoK = 0.410 mm-1 and F (000) = 1376. The structure was refined to R = 0.0521 and wR = 0.0744 for 5909 observed reflections with I> 2 (I). X-ray diffraction analysis reveals that there are three rings in the molecule. The saturated 6-membered ring presents in chair conformation and the 5-membered phosphoroheterocycle is planar. The existence of dp? bonds between P and two N atoms and the intermolecular hydrogen bonds are found as well.