Objective To investigate the influencing factors for recurrence after borehole drainage (BHD) for chronic subdural hematoma (CSDH).Methods The clinical data of 160 patients with CSDH who underwent BHD were analyzed retrospectively. The multivariate logistic regression analysis was used to determine the influencing factors for postoperative recurrence.Results Of all the 160 patients, 14 (8.75%) experienced postoperative recurrence, and the time to recurrence ranged from 15 days to 12 months. The univariate analysis showed that age (P=0.049), hematoma volume (P=0.004), preoperative midline shift (P=0.019), and hematoma thickness (P=0.024) were associated with postoperative recurrence. The multivariate analysis showed that hematoma volume (P=0.008) was the independent risk factor for postoperative recurrence.Conclusions Several factors influence the recurrence after BHD for CSDH, and hematoma volume can be used as an independent predictor for postoperative recurrence.