Professor XU Youjia divides pediatric nephrotic syndrome into two stages:the attack stage and the remission stage.He proposes a"five stage syndrome differentiation"system for treating the attack stage,which di-vides the attack stage into five stages:the stage of superficial excess syndrome,the stage of superficial deficiency syndrome,the stage of damp heat syndrome,the stage of mild internal deficiency syndrome,and the stage of severe internal deficiency syndrome.These 5 stages are a process of transitioning from syndrome of the disease to the cause,from mild to severe,and can be mutually transformed.According to different stages,the treatment of syndrome differ-entiation has achieved good curative effect,which is worthy of clinical reference and promotion.One case is presen-ted for verification.