Objective To explore the effect of tubeless minimally invasive（percutaneous nephrolithotomy,PCNL）in the treatment of impacted upper ureteral stones．Methods A total of 95 patients with impacted upper ureteral stones admitted to our hospital from December 2019 to December 2021 were grouped according to the random number table method．Control group of 47 cases were treated with transurethral ureteroscopy lithotripsy（TURL）,48 patients in the observation group were given tubeless minimally invasive PCNL treatment．The general surgical conditions,serological indicators,renal hemodynamics and complications of the two groups were observed．Results The operation time,postoperative hematuria and hospitalization time of the observation group were shorter than those of the control group,the intraoperative bleeding volume of the observation group was less than that of the control group,and the stone free rate of the observation group was higher than that of the control group（P<0.05）．One day after surgery,the levels of kidney injury molecule-1（KIM-1）,lipocalin（NGAL）and cystatin C（Cys-C）in the observation group were lower than those in the control group（P<0.05）;the renal artery systolic blood flow velocity（V_s）and end-diastolic blood flow velocity（V_d）had no statistical significance（P>0.05）;the incidence of complications in the observation group（4.16%）was lower than that in the control group（19.15%）（P<0.05）．Conclusions Tubeless minimally invasive PCNL can improve the general conditions of surgery,reduce kidney damage,increase stone free rate,does not affect renal blood flow,and has fewer complications．