Background Secondary glioblastoma (sGBM) is a specific, and prognostic factors of sGBM are still unclear. This study retrospectively investigated clinical prognosis factors of survival outcomes of sGBM.Methods All of 125 patients were recruited in this study. Clinical characteristics and survival outcomes were acquired from inpatient records and follow-ups. Kaplan‑Meier survival analysis and Cox survival analysis were applied to identifying prognostic factors.Results The median overall survival (OS) were 301 days. Gross total resection (GTR) (HR = 0.613, 95% confident interval (CI) = 0.408-0.923, p = 0.019), diagnosed sGBM without newly occurring symptoms when regular re-examination (DR) (HR= 0.481, 95% CI = 0.308-0.750, p = 0.001), higher postoperative Karnofsky Performance Status (KPS) score (HR = 0.977, 95% CI = 0.961-0.993, p = 0.006) were independently favorable prognosis factors for OS. GTR was the favorable factor for OS of sGBM patients of DR (HR = 0.238, 95% CI = 0.100-0.570, p = 0.001) and with new functional impairments (HR = 0.410, 95% CI = 0.205-0.821, p = 0.012). Additionally, postoperative KPS score not decreasing was the favorable factor for OS of sGBM patients with new functional impairments (HR = 0.401, 95% CI = 0.202-0.795, p = 0.009) and with new occurring epilepsy (HR = 0.295, 95% CI from 0.092 to 0.950, p = 0.041).Conclusions For patients with sGBM, GTR, higher postoperative KPS score, and diagnosed without newly occurring symptoms were favorable factors for the OS. The GTR was recommended for sGBM patients to improve survival outcomes.