Abstract:[Objective] To compare the clinical outcomes of two dural sealing methods for prevention of cerebrospinal fluid leakage. [Methods] A retrospective study was conducted on 72 patients who underwent surgical treatment for intraspinal subdural tumors from Janu- ary 2015 to December 2018. Of them, 32 patients received gelatin sponge coverage on the dural after tumor resection and dural suture (the GS group) , while the remaining 40 patients underwent fat combined with gelatin sponge coverage on the dural (the combined group) . The clinical results were compared between the two groups. [Results] There were no significant differences in operative time, intraoperative blood loss, length of dural incision and incidence of surgical site infection between the two groups (P>0.05) . However, the combined group proved significantly superior to the GS group in terms of postoperative drainage volume, drainage time, postoperative hospital stay and inci- dence of cerebrospinal fluid leakage (P<0.05) . As time went during the follow-up lasted for (28.24±4.63) months, the VAS scores in both groups decreased significantly (P<0.05) , which proved not statistically significantly different between the two groups at any matching time points (P>0.05) . In addition, there was no statistical significance in the clinical outcomes in term of modified Macnab criteria between the two groups (P>0.05) . [Conclusion] For intraspinal subdural tumors resection, fat tissue combined with gelatin sponge coverage on dual is superior to the coverage with gelatin sponge only for prevention of cerebrospinal fluid leakage.