Guillain-Barré Syndrome (GBS) is an autoimmune disorder affecting the peripheral nervous system, characterized by progressive weakness and diminished or absent myotatic reflexes. While GBS typically exhibits a monophasic course, recurrent episodes can occur in certain patients. This study aimed to explore potential risk factors associated with recurrent GBS. We conducted a retrospective analysis involving GBS patients admitted to Beijing Tiantan Hospital between January 2012 and January 2022. Patients were categorized into recurrent and non-recurrent groups based on follow-up outcomes, meanwhile, clinical and laboratory data were compared between the two cohorts. Then, we integrated statistically significant indicators to identify independent risk factors for recurrent GBS using multifactorial logistic regression. Univariate analysis revealed that hematocrit (HCT) and mean platelet volume (MPV) were significantly elevated, whereas free triiodothyronine (FT3) and the percentage of vaccination was lower in patients with recurrent GBS compared to non-recurrent groups. Multifactorial logistic regression analysis revealed HCT (OR:1.015;95%CI: 1.001–1.028༛P = 0.032) is an independent risk factor for recurrent GBS. Elevated serum HCT levels correlate with an increased risk of recurrent GBS. Crucially, the incidence of recurrent GBS patients rises in tandem with rising serum HCT levels.