Objective To evaluate the effectiveness of cognitive behavioral therapy for suicidal tendencies by meta-analysis. Methods Randomized controlled trials reporting cognitive behavioral therapy for suicidal tendencies published until April 26,2023 were searched in the PubMed, Ovid, Embase, Cochrane Library, Web of Science, CNKI, Wanfang, VIP, and China Biology Medicine(CBM).Two investigators independently screened the literatures, extracted data and performed quality evaluation. Meta-analysis was conducted using RevMan 5.2 software. Results A total of 13 articles involving 1,660 patients with suicidal tendencies were included. The results of the meta-analysis showed that in contrast to the usual care and routine care, cognitive behavioral therapy more significantly reduced suicidal ideation (SMD=-0.35, 95%CI -0.51, -0.18,P<0.0001), and improved the depression (SMD=-0.34, 95%CI -0.46, -0.21,P<0.00001), anxiety (SMD=-0.22, 95%CI -0.38, -0.06,P=0.007), despair (SMD=-0.23, 95%CI -0.38, -0.08,P=0.003) and quality of life (SMD=0.32, 95%CI 0.07, 0.57,P=0.01). Conclusion Cognitive behavioral therapy can reduce suicidal ideation in suicidal tendency patients and significantly improve negative emotions such as depression, anxiety and despair, but the improvement of quality of life lacks sufficient evidence, and more studies should be conducted.