Henoch – Schonlein purpura (HSP) is the most common systemic vasculitis of childhood and the prognosis of kidney damage is usually severe. Objectives: To describe some clinical, subclinical characteristics and study some relationships in children with Henoch Schonlein purpura nephritis (HSPN). Methods: A cross - sectional descriptive study, 42 patients with the diagnosis of HSPN at the Vietnam National Children’s Hospital from 7/2017 to 6/2020. Results: 29 boys (69,05%). The median age at diagnosis was 9,4 ± 3,09. Kidney damage occured mainly in the first 3 weeks. 59,5% of children had mild renal impairment of hematuria and/or proteinuria, 40.5% of children had nephritic - nephrotic syndrome. The most common histopathological result was endothelial proliferation (E1 accounting for 71,43%), 71,4% had crescents on renal biopsy, mainly in persistent skin rash, gastrointestinal bleeding, nephritic syndrome, hypertension, high proteinuria.There was a linear correlation between proteinuria and crescents. Conclusions: Kidney damage mainly appeared in the first 3 weeks, in which nephritic - nephrotic syndrome accounted for nearly ½ of the patients. Endothelial proliferation was the most common. Patients with persistent skin rash, gastrointestinal bleeding, nephrotic syndrome, hypertension, and high proteinuria are associated with crescents on renal biopsy.