Abstract: ‘Qicheng 52’is a new cultivar developed from the fine mutation lines of‘Newhall’navel orange. The fruits are oval in shape，with orange peel，seedless. The fruit weight is 180–270 g. The soluble solids content is 11.5%–13.0%，total sugar is 8.5%–11.8%，the titratable acid is 0.46%–0.73%，and vitamin C is 41.8–53.6 mg · kg-1. The fruit quality is excellent. It bears early，with high and stable yield，good fruit quality and high resistance to diseases.

Key words: navel orange, cultivar