Abstract: The paper aims to explore the adaptability and optimal sowing date of quinoa in the shallow mountain areas of Beijing, we conducted the comparative test with 8 sowing date from late March to middle July by using the variety ‘Longli-1’. The results showed that: the optimal sowing date for ‘Longli-1’ in the shallow mountain area of Beijing was late May; its whole growth period was 104 days, plant height was 153.6 cm, the 1000-grain weight was 3.14 g, and the yield was 1781.25 kg/hm2; the viewing period was 18 days; the ears and stalks of quinoa could all turn red when they were mature; the landscape effect of the whole farmland was fine. Premature varieties with similar breeding days as ‘Longli-1’ could be planted in Yanshou, Changping in late May, demonstration sites could be extended to Changping, Mentougou, Miyun, Huairou, Pinggu and other shallow mountainous areas with the similar elevation (300 m), average annual temperature and average annual accumulated temperature.