Objective To explore the clinical effect of percutaneous nephrolithotomy for treatment of staghorn kidney stonesusingmicro-channel combined with vacuum suction. Methods A total of 138 patientsofstaghorn kidney stones with PCNL in our hospital from January 2016 to December 2017 were included and divided into experimental group and control group according to the size of the channel and the vacuum suction device. Y-type minimally invasive dilatation drainage kit of 20F micro-channelandvacuum suctionwere used in experimental group within 66 patients.A standard channel (22F diameter) without vacuum suction was used in control group within 72 patients. The changes in vital signs, intrapelvic pressureand incidence of postoperative fever were compared between experimental and control groups. Results The vital signs variety of blood pressure and heart rate, intrapelvic pressure and incidence of postoperative fever in experimental group were lower than those in control group(P<0.05). Conclusion Micro-channel combined with vacuum suctioninpercutaneous nephrolithotomy for treatment of staghorn kidney stones could effectively maintenance of stable vital signs, reduce intrapelvic pressure and the incidence ofpostoperative fever, and improve the safety of surgery.