‘Zuanshihong N3’ is a new variety of red-skin onion type，bred in 2016 through ion beam mutation and conventional breeding methods using ‘Zhengzhouzihongpi’ as female parent.This breed belongs to a medium-precocious variety，its reproductive period is 250-270 days.The plant has strong growth vigor.The average plant height is 76.2 cm，the horizontal diameter is 9.9 cm，the longitudinal stem is 7.2 cm，the single onion weight is 282 g，the average total sugar content is 6.98%，the dry matter content is 95.0 g?kg-1，and the yield is 5 346 kg per 667 m2.It has strong disease resistance and resistance to storage and transportation.It is high resistant to purple spot disease，onion mildew and viral disease.It is suitable for cultivation in Henan，Hebei，Shandong Province and other central regions of China.