Abstract: Objective: To analyze the clinical characteristics of cerebral infarction in different ages and evaluate the effects of CT diagnosis on clinical condition, clinical treatment and clinical characteristics. Method: Chose 62 cases of cerebral infarction as the research object, which were treated in our hospital from May 2016 to May 2017. According to the age, they were divided into the elderly group (> 65 37 cases) and the middle age group (<65 years old, 25 cases). Analyzed the clinical manifestations and the differences of CISS parting of two groups. The CT imaging features of patients with cerebral infarction were summarized by CT scanning of the head. After that, all the patients were treated with intravenous thrombolysis and after the following three months of follow-up, the clinical curative effect was evaluated by the GOS score. Results: There was no statistical significance (P>0.05) in CISS parting LAA, CS, PAD, OE between the elderly group and the middle-aged group. The UE ratio of the elderly group was significantly higher than that of the middle-aged group (P<0.05), and LAA and UE weremore common in 62 patients. The number of headache and dizziness in the middle-aged group was obviously higher than that of the elderly group. However, the number of hemiplegic, mental disorder and urinary incontinence of the elderly group was significantly higher than that of the middle-aged group (P<0.05). The headache, dizziness, vomiting, hemiplegic and consciousness disorder were more common in 62 cases. Through CT scanning, there were a total of 276 lesions, of which 46 cases of lacunar cerebral infarction and 16 cases of multiple cerebral infarctions. The location of lesions of 17 cases of was in the cerebellum, that of 20 cases was in the cortex, that of 14 cases was in the brain stem, and that of 11 cases in the basement area. After 3 months of thrombolysis, the results of the GOS score showed 20 cases were level 5, 26 cases were level 4, 12 cases were level 3, 2 cases were level 2 (persistent vegetative state), and 1 case level 1 (death). Conclusion: There was significant difference in clinical characteristics of cerebral infarction in the different age groups. The type of UE was more in the elderly patients and it’s more likely to appear hemiplegic, incontinence, disturbance of consciousness, but headache of the middle-aged patients was more. In addition, CT diagnosis can provide some basis for the analysis of clinical condition, clinical treatment and clinical characteristics.