Objective To systematically integrate the best available evidence on nutritional management for children with nephrotic syndrome, thereby providing an evidence-based foundation for developing clinical nutrition management protocols. Methods We comprehensively searched electronic databases (including clinical decision support systems, guideline repositories, and professional organizations related to nephrotic syndrome) for literature published from database inception to September 2025. Eligible publications included clinical guidelines, expert consensus reports, clinical decisions, practice recommendations, systematic reviews, and RCTs. Two researchers trained in evidence-based practice independently evaluated study quality and extracted the evidence. Results Thirteen publications were included (1 clinical decision, 9 guidelines, 3 expert consensus reports). Twenty-four evidence-based recommendations were synthesized across seven domains:nutritional assessment and multidisciplinary collaboration；energy management；protein management；sodium and fluid management；vitamin D and calcium supplementation；trace element regulation；therapeutic diets. Conclusion This evidence summary provides scientifically validated guidance for nutritional management in pediatric nephrotic syndrome. Healthcare professionals should judiciously adapt these recommendations to individual patient contexts when implementing nutritional interventions to maximize clinical benefits.