目的 研究蒸汽爆破预处理白芦笋下脚料多糖提取的最佳工艺，分析蒸汽爆破预处理对多糖得率的影响。方法 以白芦笋加工下脚料为原料，采用蒸汽爆破预处理提取多糖，探讨物料粒径、汽爆压力、维压时间、料腔比(物料与料腔体积的比值)对多糖得率的影响，利用响应面优化设计筛选白芦笋下脚料多糖的最佳提取工艺。结果 汽爆压力对白芦笋下脚料多糖得率的影响最大，其次为物料粒径、维压时间、料腔比。得到了响应面优化蒸汽爆破预处理的最佳提取条件，物料粒径为30目，维压时间为128 s，汽爆压力为1.50 MPa，在此条件下多糖得率的实测值达到8.86%，较直接热水浸提法的多糖得率增加了22.88%。结论 蒸汽爆破预处理对提升多糖得率具有一定的促进作用。

The work aims to study the optimal technological conditions for extraction of polysaccharides from white asparagus scraps processing waste pretreated by steam explosion and analyze the effects steam explosion pretreatment on yield of polysaccharides. With white asparagus scraps processing waste as raw materials, the polysaccharides were extracted by steam explosion pretreatment to discuss the effects of particle size, steam explosion pressure, steam explosion time and material cavity ratio on the yield of polysaccharides. The optimal extraction process response of polysaccharide from white asparagus processing waste was designed and optimized by response surface optimization. The results showed that the effect of steam explosion pressure on the yield of polysaccharides was the biggest, followed by the particle size, steam explosion time and material cavity ratio. The optimal extraction conditions of steam explosion pretreatment were material size of 30 meshes, steam explosion time of 128 s, steam explosion pressure of 1.50 MPa. Under this condition, the yield of polysaccharides reached 8.86%, which was 22.88% higher than that of direct hot water extraction. The results show that steam explosion pretreatment has a certain promoting effect on improving the yield of polysaccharides.