Abstract:[Objective] To systematically compare the clinical outcomes of nano- hydroxyapatite (NHP) versus polyetheretherketone (PEEK) cages used in spinal interbody fusion. [Methods] The clinical studies on the comparison of spinal fusion efficacy with NHP versus PEEK cages were collected from CNKI, Wanfang, VIP, EMBASE, PubMed and The Cochrane Library CBM databases before October 2021. Meta- analysis of outcome indicators was conducted using Stata/SE 12.0 software. [Results] A total of 6 studies were included into the study, involving 654 patients, including 365 patients in the NHP group and 289 patients in the PEEK group. As result of the meta-analysis, there were no significant differences between the two groups in terms of intervertebral height (WMD=- 0.02, 95% CI:-0.21~0.17, P= 0.843) , fusion rate (RR=1.002, 95%CI: 0.96~1.05, P=0.911) , collapse rate (RR=0.824, 95%CI: 0.47~1.44, P=0.494) , postoperative ODI (WMD=0.13, 95%CI: -0.77~1.03, P=0.779) , postoperative VAS score (WMD=0.11, 95%CI: -0.40~0.62, P=0.675) , fusion level curvature (WMD=-0.13, 95%CI:-0.63~0.3, P=0.598) , operative time (WMD=-2.26, 95%CI: -7.17~2.64, P=0.366) , and intraoperative blood loss (WMD=1.08, 95%CI: -9.66~11.83, P=0.844) . [Conclusion] The NHP cage proves similar safety and clinical outcomes with the PEEK cage, and the former is an ideal intervertebral fusion device to replace the latter.