Abstract: The late ripening new chestnut cultivar‘Yanbao’was selected from the wild seedlings in Yanshan region. It has excellent characteristics such as high yield，high quality，big nut and good color. The average nut weight is 9.0 g，with purplish brown and glossy shell. The density of pubescence is sparse and the tendon lines are inapparent. The nut is ellipse with uniform size and milk yellow flesh，which stir-fry delicate，sweet and waxy. The nuts mature period is late September，with yield per tree 6.73 kg，equivalent to 5 604 kg • hm-2.‘Yanbao’has strong drought and cold resistance，and appropriate to be planted in hilly region of Mount Yanshan，the appropriate pollination cultivars are‘Yanshan Zaofeng’‘Yanlong’and‘Yanli’.

Key words: chestnut, late ripening, high quality, high yield, cultivar