Objective To discuss Spiral CT and magnetic resonance imaging (MRI) on traumatic optic neuropathy (TON) whose diagnosis and curative effect judgment value. Methods 50 cases of patients with TON were admitted in our hospital from 2011 to June 2013,who were used the 3D reconstruction of CT and magnetic resonance short time inversion recovery sequence (STIR) scanning for preoperative diagnosis, the diagnostic value between two methods was compared ,after operation ,they were used STIR sequence scan evaluation of optic nerve decompression. Results The detection rate of Spiral CT was 90.0%(45/50)and the detection rate of MRI was 88.0%(44/50), the difference had no statistical significance (P＞0.05);Among them, there were10 cases of CT examination of the optic canal fracture site in front of the tube type, 13 cases of the half pipe type, 19 cases of full pipe, 3 cases of sphenoid saddle, 23 cases of MRI examination in nerve injury types of edema, 6 cases of Vaginal bleeding, 1 cases of displacement, 19 cases of atrophy, the comparison of both and test results of pathology were not statistically significant(all were P＞0.05); Patients were treated with decompression after Mr STIR sequence scanning, 70% (35/50) of patients with optic nerve injury improved significantly, 16.0%(8/50)of patients did not improve significantly, there is also a certain degree of edema or atrophy. Conclusion CT 3D reconstruction can clearly display the optic canal fracture, and accurately positioned, STIR sequence scanning on soft group has higher resolution, can accurately judge the optic nerve injury, and it has the assessment of optic nerve decompression effect of the circumstances, the combination of the two diagnosis can provide more sufficient and practical imaging support for clinical reasonable treatment program.