To explore the effects of biodegradable film on the yield and sugar content of sugar beet in Ta’e basin，a field experiment was carried out from 2021 to 2022，two films，including the beet special biodegradation film(BD)and polyethylene film(PE)were used as treatment，and no film(CK)was used as control. The effects of different mulching films on soil temperature，soil water content，sugar content and beet yield were analyzed. The results showed that BD and PE treatments had obvious effects on increasing temperature and keeping soil moisture，compared with CK. The yield，sugar content and sugar yield of BD treatment were the highest，which were 5.62%，7.91%，15.83% higher than those of PE treatment，and 19.85%，9.96%，33.96% higher than those of CK，respectively. The degradation rates of film in BD treatment were 75.23% and 78.43% for 2021 and 2022，respectively. To sum up，biodegradation film can keep good integrity in the early stage of sugar beet growth in Ta’e basin，and shows a good warming effect. At the same time，biodegradation film can significantly improve the sugar beet yield，sugar content，sugar yield and the income，so the large-scale application is recommended.