To explore the risk factors for peripherally inserted central venous catheter (PICC)-related complications in children. This retrospective study analyzed data collected from electronic medical records. A total of 584 patients with indwelling PICC treated between January 2019 and August 2021 were included in this study. According to the occurrence of PICC-related complications, the patients without PICC-related complications were included in the control group (n = 538) and those with PICC-related complications were included the observation group (n = 46). The risk factors for PICC-related complications were analyzed. Of the 584 patients with PICCs, 46 (7.88%) had PICC-related complications. Univariate analysis revealed significant differences in venipuncture (P < .001), oozing of blood from the puncture point (P < .001), indwelling time (P < .001), intravenous nutrient solution (P < .001), and catheter type (P = .003). Complications were used as dependent variables. The independent variables were vein puncture, blood oozing at the puncture point, indwelling time, intravenous nutrient solution, and catheter type. Multivariate logistic regression analysis revealed that the vein puncture (odds ratio [OR] 10.115, 95% confidence interval [CI] 5.034–20.323, P < .001), puncture point blood oozing (OR 9.217, 95% CI 3.860–22.004, P < .001), indwelling time (OR 6.390, 95% CI 3.527–10.972, P = .005), intravenous nutrient solution (OR 2.593, 95% CI 1.675–4.015, P < .001), and catheter type (OR 8.588, 95% CI 2.048–19.095, P = .013) were all risk factors for PICC-related complications in children. Venipuncture, oozing of blood from the puncture point, indwelling time, intravenous nutrient solution, and catheter type are risk factors for PICC-related complications in children. Significant attention should be paid to whether the puncture point is bleeding, the presence or absence of an intravenous nutrient solution, duration of catheterization, type of catheterization, and venipuncture. Additionally, preventive nursing measures should be implemented as soon as possible to reduce the risk of complications related to peripheral PICC.