Abstract: 【Objective】 To study the 6 μm Effects of beet special biodegradable film on beet growth, yield and sugar content. 【Methods】 P87 6 μm Special biodegradable plastic film (BD) and ordinary polyethylene mulch (PE) were used, and bare land (CK) was used as control to analyze the effects of different film mulching on 10 cm soil temperature, beet growth, beet yield and sugar content. 【Results】 BD and PE had an more obvious warming effect than CK. The cumulative temperature of 10cm soil under the three treatments was PE>BD>CK; BD and PE significantly promoted the root length and surface area of sugarbeet; In terms of sugar content of sugarbeet, BD and PE had certain sugar increasing effect compared with CK, but the sugar increasing effect of BD treatment was more significantly increased by 10.17% and 1.6% respectively; The degradation rate of plastic film treated with BD in the current season could reach 75.23%, which significantly reduced white pollution. 【Conclusion】 BD mulching film can maintain good integrity in the early stage of sugarbeet growth with a good warming effect. At the same time, BD can significantly improve the root length, root surface area, aboveground and underground dry matter quality, yield, sugar containing rate and sugar content of sugarbeet, and improve the income.