To explore the correlation between Hunt-Hess grading and complications as well as neurological dysfunction in patients with aneurysmal subarachnoid hemorrhage (aSAH). Methods: Clinical data of 195 aSAH patients treated from October 2011 to October 2021 were retrospectively analyzed. Patients graded I-III on the Hunt-Hess scale were included in the low-grade group (86 cases), and those graded IV-V were included in the high-grade group (109 cases). General conditions, scale scores, complications, and main dysfunctions of patients in both groups were compared, and indicators with significant differences were analyzed using multivariate logistic regression. Results: The Hunt-Hess grading was positively correlated with hydrocephalus (OR 2.850, 95%CI 1.560-5.206), motor dysfunction (OR 3.522, 95%CI 2.026-6.121), language dysfunction (OR 1.928, 95%CI 1.062-3.500), consciousness disorder (OR 3.662, 95%CI 1.558-8.607), and swallowing disorder (OR 2.383, 95%CI 1.248-4.550); it was negatively correlated with age (OR 0.970, 95%CI 0.945-0.996), secondary cerebral infarction (OR 0.414, 95% CI 0.227-0.754), Fugl-Meyer balance score (OR 0.890, 95% CI 0.818-0.968), and ADL score (OR 0.983, 95% CI 0.971-0.994). Conclusion: Patients in the high-grade Hunt-Hess group have a higher incidence of hydrocephalus and more severe overall dysfunction, while younger patients have a higher survival rate; however, regardless of the level of Hunt-Hess grade, patients are at risk of cognitive disorders. Timely screening and individualized rehabilitation should be considered.