The increasingly serious problem of saline-alkali land restricts the development of sugar beet in Hetao irrigation area. Based on the previous studies，the combined application of different soil conditioners can improve the physical and chemical properties of soil，and then improve the yield and quality of crops，but there are few reports on sugar beet in saline-alkali soil. Therefore，from 2019 to 2020，humic acid conditioners with different ratios were applied in saline-alkali soil of Hetao Irrigation District. By analyzing the changes of sugar beet yield and quality，biomass of various organs，leaf area index and salt content in soil among different treatments，it was concluded that:(1) Humic acid conditioners with different ratios improved the yield and quality of sugar beet in saline-alkali soil. Compared with the control，the yield and sugar yield of sugar beet increased by 11.29%-32.54% and 13.50%-38.61%，respectively，and the effects were different. (2)Applying different ratios of humic acid conditioners could promote the growth and development of sugar beet in saline-alkali land and improve the photosynthetic efficiency of sugar beet plants. (3) Applying humic acid conditioner reduced the salt content of saline-alkali soil in the current season，which was 0.59-3.17 percentage points lower than that of plots without conditioner，thus improving the soil environment for the growth and development of sugar beet. The above conclusions provide a theoretical basis for revealing the effects of soil conditioners on the biological characteristics，yield and quality of sugar beet in saline-alkali soil and the improvement of soil physical and chemical properties.