Abstract: ‘Hangza 503’is a new cherry tomato hybrid with 1527-3-6-1-3-1-1 as female parent and 19-1-7-3-2-1-1 as male parent. The fruit is long oval，with a single fruit weight of 18 g. The mature fruit is bright yellow，with good luster. The soluble solids content is above 9%. It’s sweet and sour，with crisp texture and good continuous fruit setting capacity. The fruit is resistant to cracking and transportation. The plant has good resistance to leaf mold，root knot nematode，tomato mosaic virus and Fusarium wilt. It is suitable for early spring facilities in the middle and lower reaches of the Yangtze River and summer cultivation in high mountains above 700 meters above sea level.

Key words: cherry tomato, quality, cultivar