Objective：The effect of coronavirus disease-2019（COVID-19）on detrusor contractility in patients with benign prostatic hyperplasia（BPH）was investigated using sonography video urodynamics studies（SVUDS）. Methods：The clinical dataset，including general condition，inflammatory indexes，and SVUDS parameters of 124 BPH patients with or without COVID-19 infection admitted to the Second Affiliated Hospital of Guilin Medical University and Shaoyang Central Hospital between January and June 2023 were retrospectively reviewed. Those patients were divided into the COVID-19（+）（n=51）and COVID-19（-）（n=73）groups according to the results of virus nucleic acid detection，and the differences in general corditions，inflammatory indicators，and SVUDS parameters were compared between two groups. The correlations of inflammatory indexes and non-invasive SVUDS parameters with detrusor contractility in BPH patients of the COVID -19（+）group were analyzed. Results：The serum level of C-reactive protein（CRP）and interleukin（IL）-6 of BPH patients in the COVID-19（+）group were significantly higher than that of the COVID-19（-）group（P < 0.05），whereas no significant differences in age，IL-1β，prostate specific antigen（PSA），free prostate-specific antigen（fPSA），fPSA/ PSA，prostate volume（PV），prostate specific antigen density（PSAD），intravesical prostatic protrusion（IPP），peak flow rate（Qmax）， urethral resistance factor（URA），bladder outlet obstruction index（BOOI），footpoint，and curvature were found between the two groups （P > 0.05）. Significant thicker bladder wall thickness（BWT），larger post -void residual volume（PVR），and lower value of detrusor contractility indexes，including maximum detrusor pressure（Pdet.max），detrusor pressure at peak flow rate（Pdet.Qmax），bladder contractility index（BCI）and maximum Watts factor（WF_max），were observed in BPH patients of the COVID（+）group，compared with those of the COVID（-）group（P <0.05）. The negative correlations between BWT and WF_max（r=-0.313，P=0.036），between PVR and BCI（r=-0.471，P=0.001），and between PVR and WF_max（r=-0.491，P=0.001）were found in BPH patients of the COVID-19（+）group. Conclusion：COVID-19 may aggravate detrusor underactivity in BPH patients，resulting to the increased PVR even urinary retention， which may be one urodynamics features of long-COVID in those BPH patients.